Eccotemp 6GB BUILDER Series Installation guide

INSTALLATION, USE AND CARE INSTRUCTIONS
WHOLE-HOME TANKLESS WATER HEATER
INDOOR MANUAL
6GB BUILDER SERIES
6GB-ILP
6GB-ING
Apartment/Condos
Tiny HouseOffice
Cabins
Shower
Mid Size Home
Whole Home Town Home

PLEASE NOTE: 6GB IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE.
PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.
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English
WARNING! If the information in these
instructions is not followed exactly, a
re or explosion may result causing
property damage, personal injury or
death.
• Do not store or use gasoline or
other ammable vapors and liquids
in the vicinity of this or any other
appliances.
• WHAT TO DO IF YOU SMELL GAS
• Do not try to light any
appliances.
• Do not touch any electrical
switch; do not use any phone in
your building.
• Immediately call your gas
supplier from a neighbor’s
phone. Folow the gas supplier’s
instructions.
• If you cannot reach your
gas supplier, call the re
department.
• Installation and service must be
performed by a qualied installer,
service agency or the gas supplier.

2
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Designed in
Summerville, SC
Support: Support.Eccotemp.com Shop Online: www.eccotemp.com Phone: [phone]
PLEASE NOTE: 6GB IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE.
PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.
English
Eccotemp Systems, LLC
315-A Industrial Road
Summerville, SC 29483
866-356-1992
AUTOMATIC INSTANTANEOUS WATER HEATER
MODEL #: 6GB-ILP
SERIAL #
GAS TYPE: LIQUID
PROPANE ONLY Minimum Inlet Gas Pressure:
Minimum Input Rating (Btu per hour):
Maximum Input Rating (Btu per hour):
Voltage: 120 Volts Maximum Inlet Gas Pressure:
Frequency: 60 Hz Manifold Pressure:
Amps: Less than 10 Amperes Maximum Working Pressure:
Recovery
Rating:
SUITABLE FOR WATER (POTABLE) HEATING ONLY
As used in this standard, the quantity of water obtained by multiplying the manufacturer’s
input rating in Btu per hour by the thermal efficiency and dividing the product by 825 Btu
per gallon. This is based on a 100°F (37.8°C) temperature rise, and a nominal specific heat
for water of 8.25 Btu per gallon per degree F.
FOR YOUR SAFETY
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance
This appliance must be installed in accordance
with local codes or, in the absence of local
codes, the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 or the CSA B149.1, Natural
Gas and Propane Installation Code
145,000
18,000
8.0” W.C.
(1.99 kPa)
13’’ W.C.
(3.23 kPa)
5.1’’ w.c
(1.27 kPa)
150 PSI
CANADIAN HIGH ALTITUDE RATING
0-2000 feet
180,000
5.1
Input (btu/hr)
Altitude
Manifold pressure (in. w.c)
The temperature and pressure relief valve provided by the manufacturer shall be installed at the time of
installation of the heater in the location specified by the manufacturer. Local codes shall govern installation
of relief devices. For safe operation of the water heater, the relief valve must not be removed or plugged.
INDOOR USE ONLY
The unit must be installed on a fire retardant area, and must be away from all
combustible materials. Clearance should be 1.75 ft to the left and right side of
combustible materials, and 6.75 ft to the front.
Open on three sides and an overhead clearance of 36”
Not recommended in excess of 2,000 ft. above sea level. Category III Type B Water Heater
CSA/ANSI Z21.10.3 • CSA 4.3-2021
Eccotemp Systems, LLC
315-A Industrial Road
Summerville, SC 29483
866-356-1992
AUTOMATIC INSTANTANEOUS WATER HEATER
MODEL #: 6GB-ING
SERIAL #
GAS TYPE: NATURAL
GAS ONLY Minimum Inlet Gas Pressure:
Minimum Input Rating (Btu per hour):
Maximum Input Rating (Btu per hour):
Voltage: 120 Volts Maximum Inlet Gas Pressure:
Frequency: 60 Hz Manifold Pressure:
Amps: Less than 10 Amperes Maximum Working Pressure:
Recovery
Rating:
SUITABLE FOR WATER (POTABLE) HEATING ONLY
As used in this standard, the quantity of water obtained by multiplying the manufacturer’s
input rating in Btu per hour by the thermal efficiency and dividing the product by 825 Btu
per gallon. This is based on a 100°F (37.8°C) temperature rise, and a nominal specific heat
for water of 8.25 Btu per gallon per degree F.
FOR YOUR SAFETY
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance
This appliance must be installed in accordance
with local codes or, in the absence of local
codes, the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 or the CSA B149.1, Natural
Gas and Propane Installation Code
145,000
18,000
8.0” W.C.
(1.99 kPa)
13’’ W.C.
(3.23 kPa)
5.1’’ w.c
(1.27 kPa)
150 PSI
CANADIAN HIGH ALTITUDE RATING
0-2000 feet
180,000
5.1
Input (btu/hr)
Altitude
Manifold pressure (in. w.c)
The temperature and pressure relief valve provided by the manufacturer shall be installed at the time of
installation of the heater in the location specified by the manufacturer. Local codes shall govern installation
of relief devices. For safe operation of the water heater, the relief valve must not be removed or plugged.
INDOOR USE ONLY
The unit must be installed on a fire retardant area, and must be away from all
combustible materials. Clearance should be 1.75 ft to the left and right side of
combustible materials, and 6.75 ft to the front.
Open on three sides and an overhead clearance of 36”
Not recommended in excess of 2,000 ft. above sea level. Category III Type B Water Heater
CSA/ANSI Z21.10.3 • CSA 4.3-2021
Chauffe-eau de catégorie III
de type B
Eccotemp Systems, LLC
315-A Industrial Road
Summerville, SC 29483
866-356-1992
CHAUFFE-EAU INSTANTANÉ AUTOMATIQUE
MODÈLE # : 6GB-ILP
SÉRIE # :
TYPE DE
GAZ :
PROPANE
LIQUIDE SEULEMENT Pression minimale du gaz d’entrée :
Puissance d'entrée minimale
(Btu par heure) :
Puissance d'entrée maximale
(Btu par heure) :
Tension : 120 Volts Pression maximale du gaz d’entrée :
Fréquence : 60 Hz Pression du collecteur :
Ampères : Moins de 10 Ampères Pression de service maximale :
Note de
Récupération:
ADAPTÉ À L’EAU (POTABLE) CHAUFFAGE SEUL
Telle qu'utilisée dans cette norme, la quantité d'eau obtenue en multipliant la valeur
nominale d'entrée du fabricant en Btu par heure par l'efficacité thermique et en divisant le
produit par 825 Btu par gallon. Ceci est basé sur une augmentation de température de 100 °F
(37,8 °C) et une chaleur spécifique nominale pour l'eau de 8,25 Btu par gallon par degré F.
POUR VOTRE SÉCURITÉ
Ne pas entreposer ou utiliser de
l’essence ou d’autres vapeurs et liquides
inflammables à proximité de cet appareil
ou de tout autre appareil
Cet appareil doit être installé conformément
aux codes locaux ou , en l’absence de codes
locaux , le National Fuel Gas Code, ANSI Z223.1
/ NFPA 54 ou le CSA B149.1 , gaz naturel et
propane Code d’installation
145,000
18,000
8.0” W.C.
(1.99 kPa)
13’’ W.C.
(3.23 kPa)
5.1’’ w.c
(1.27 kPa)
150 PSI
CANADIENNE ALTITUDE NOTE HAUT
0-2000 pieds
180,000
5.1
Entrée (btu/h)
Altitude
Pression du collecteur (po CE)
La soupape de sûreté température et de pression fournies par le fabricant doit être installé au moment de
l’installation du chauffe-eau à l’emplacement indiqué par le fabricant . Les codes locaux régiront l’installation
de dispositifs de secours . Pour un fonctionnement sûr de l’appareil de chauffage de l’eau , la soupape de
sûreté ne doit pas être enlevé ou branché.
UTILISATION EN INTÉRIEUR UNIQUEMENT
L’appareil doit être installé sur une zone de retardateur de feu, et doit être loin de tous
matériaux combustibles . Jeu doit être de 1,75 m sur le côté gauche et à droite de
matières combustibles , et de 6,75 m à l’avant .
Ouvert sur trois côtés et une hauteur libre de 36 “
Non recommandé au-dessus de 2 000 pieds au-dessus
du niveau de la mer.
CSA/ANSI Z21.10.3 • CSA 4.3-2021
Chauffe-eau de catégorie III
de type B
Eccotemp Systems, LLC
315-A Industrial Road
Summerville, SC 29483
866-356-1992
CHAUFFE-EAU INSTANTANÉ AUTOMATIQUE
MODÈLE # : 6GB-ING
SÉRIE # :
TYPE DE
GAZ :
GAZ
NATUREL SEULEMENT Pression minimale du gaz d’entrée :
Puissance d'entrée minimale
(Btu par heure) :
Puissance d'entrée maximale
(Btu par heure) :
Tension : 120 Volts Pression maximale du gaz d’entrée :
Fréquence : 60 Hz Pression du collecteur :
Ampères : Moins de 10 Ampères Pression de service maximale :
Note de
Récupération:
ADAPTÉ À L’EAU (POTABLE) CHAUFFAGE SEUL
Telle qu'utilisée dans cette norme, la quantité d'eau obtenue en multipliant la valeur
nominale d'entrée du fabricant en Btu par heure par l'efficacité thermique et en divisant le
produit par 825 Btu par gallon. Ceci est basé sur une augmentation de température de 100 °F
(37,8 °C) et une chaleur spécifique nominale pour l'eau de 8,25 Btu par gallon par degré F.
POUR VOTRE SÉCURITÉ
Ne pas entreposer ou utiliser de
l’essence ou d’autres vapeurs et liquides
inflammables à proximité de cet appareil
ou de tout autre appareil
Cet appareil doit être installé conformément
aux codes locaux ou , en l’absence de codes
locaux , le National Fuel Gas Code, ANSI Z223.1
/ NFPA 54 ou le CSA B149.1 , gaz naturel et
propane Code d’installation
145,000
18,000
8.0” W.C.
(1.99 kPa)
13’’ W.C.
(3.23 kPa)
5.1’’ w.c
(1.27 kPa)
150 PSI
CANADIENNE ALTITUDE NOTE HAUT
0-2000 pieds
180,000
5.1
Entrée (btu/h)
Altitude
Pression du collecteur (po CE)
La soupape de sûreté température et de pression fournies par le fabricant doit être installé au moment de
l’installation du chauffe-eau à l’emplacement indiqué par le fabricant . Les codes locaux régiront l’installation
de dispositifs de secours . Pour un fonctionnement sûr de l’appareil de chauffage de l’eau , la soupape de
sûreté ne doit pas être enlevé ou branché.
UTILISATION EN INTÉRIEUR UNIQUEMENT
L’appareil doit être installé sur une zone de retardateur de feu, et doit être loin de tous
matériaux combustibles . Jeu doit être de 1,75 m sur le côté gauche et à droite de
matières combustibles , et de 6,75 m à l’avant .
Ouvert sur trois côtés et une hauteur libre de 36 “
Non recommandé au-dessus de 2 000 pieds au-dessus
du niveau de la mer.
CSA/ANSI Z21.10.3 • CSA 4.3-2021

PLEASE NOTE: 6GB IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE.
PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.
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English
WARNING! This water heater may not be suitable for use in
manufactured (mobile) homes! Please check local code restrictions
pertaining to permanent/xed installations in manufactured homes in
your area.
The purpose of this manual is twofold: one, to provide the installer with
the basic directions and recommendations for the proper installation
and adjustment of the water heater; and two, to the owner-operator,
to explain the features, operation, safety precautions, maintenance and
troubleshooting of the water heater. This manual also includes a part list.
It is imperative that all persons who are expected to install, operate,
or adjust this water heater read the instructions carefully so they may
understand how to perform these operations. If you don’t understand
these instructions or any term within it, seek professional advice.
Any questions regarding the operation, maintenance, service or warranty
of this water heater should be directed to the seller from whom it was
purchased. If additional information is required, refer to the section on “If
You Need Service”.
Recognize this symbol as an indication of Important Safety Information!
DO NOT destroy this manual. Please read carefully and keep in a safe place for future reference.
California Proposition 65 Warning: This product contains chemicals known to the State of California
to cause cancer, birth defects or other reproductive harm.
WARNING! If the information in these instructions is not followed exactly, a re or explosion may
result causing property damage, personal injury, or death.
FOR YOUR SAFETY!
Improper installation, adjustment, alteration,
service, or maintenance can cause property
damage, personal injury, or death. Refer to
this manual. Installation and service must be
performed by an agency or the gas supplier.
DO NOT store or use gasoline or other
ammable vapors or liquids or other
combustible materials in the vicinity of this or
any other appliance. To do so may result in an
explosion or re.
WHAT TO DO IF YOU SMELL GAS
• DO NOT try to light any appliances.
• DO NOT touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the
re department.
• DO NOT return to your home until
authorized by the gas supplier or re
department.
Tankless Water Heater
APPLICATION
Whole Home
INSTALLATION
Indoor
TYPE
LP and NG
FLOW RATE
6 GPM
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Use & Care Manual
With Installation Instructions for the Installer

5
Designed in
Summerville, SC
Support: Support.Eccotemp.com Shop Online: www.Eccotemp.com Phone: [phone]
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4Support: Support.Eccotemp.com Shop Online: www.Eccotemp.com Phone: [phone]
PLEASE NOTE: 6GB IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE.
PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.
English
Recognize this symbol as an indication of Important Safety Information!
DO NOT destroy this manual. Please read carefully and keep in a safe place for future reference.
California Proposition 65 Warning: This product contains chemicals known to the State of California
to cause cancer, birth defects or other reproductive harm.
WARNING! If the information in these instructions is not followed exactly, a re or explosion may
result causing property damage, personal injury, or death.
FOR YOUR RECORDS
Write the model and serial numbers here:
#
#
You can nd them on a label on the water heater and/or
packaging.
Staple sales slip or canceled check here.
Proof of the original purchase date is needed to obtain service
under the warranty.
READ THIS MANUAL
Inside you will nd many helpful hints on how to use and
maintain your water heater properly. A little preventive care on
your part can save you time and money over the life of your
water heater. You’ll nd many answers to common problems
in the Troubleshooting Guide. If you review the chart of
Troubleshooting Tips rst, you may not need to call for service.
READ THE SAFETY INFORMATION
Your safety and the safety of others is very important. There are
many important safety messages in this manual and on your
water heater. Always read and obey all safety messages.
This is the safety alert symbol. Recognize this symbol as
an indication of Important Safety Information! This symbol
alerts you to potential hazards that can kill or hurt you and
others.
All safety messages will follow the safety alert symbol and
either the word “DANGER”, “WARNING”, “CAUTION” or
“NOTICE”.
These words mean:
DANGER! – An imminently hazardous situation that
could result in death or serious injury.
WARNING! – A potentially hazardous situation that
could result in death or serious injury and/or damage
to property.
CAUTION! – A potentially hazardous situation that may
result in minor or moderate injury.
NOTICE! – Attention is called to observe a specied
procedure or maintain a specic condition.
Safety Information
Safety Precautions ............5-9
6GB Installation Instructions
Location .....................11-12
Typical Installation ............14
Water Connections ...........15
Gas Supply...................16
Relief Valve ..................17
Leak Testing..................18
High Altitude.................18
Venting......................19-25
Electrical Connection..........26
Pipe Insulation ...............27
Mounting....................28
Intallation Checklist ...........29
Operating Instructions
Start Instructions .............30-31
Water Temperature ...........32
Temperature Memory .........32
Care and Cleaning
Maintenance .................33
Housekeeping................34
Extended Shut-Down .........34
Anti-Freezing ................34
Draining .....................35
Troubleshooting
Before You Call For Service.....36
Error Code Guide .............37
Parts List.....................38
Warranty
Warranty ....................39-40
Safety Information
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PLEASE NOTE: 6GB IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE.
PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.
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English
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING
Be sure to read and understand the entire Use and Care Manual before attempting to install or
operate this water heater. It may save you time and money. Pay particular attention to the Safety
Instructions. Failure to follow these warnings could result in serious bodily injury or death. Should
you have problems understanding these instructions in this manual, or have any questions, STOP,
and get help from a qualied service technician, or the local gas utility.
DANGER!
PROPERLY INSTALL WATER HEATER
Failure to properly install the water heater as outlined in the Installation Instructions in this
manual can result in unsafe operation of the water heater. To avoid the risk of re, explosion, or
asphyxiation from carbon monoxide, never operate this water heater unless it is installed properly
and has adequate air supply for proper operation. Be sure to inspect the ue terminal for proper
installation at initial start-up; and at least annually thereafter. Refer to the Care and Cleaning
section of this manual for more information regarding ue terminal inspection.
WARNING
FLAMMABLE OR COMBUSTIBLE MATERIALS
Gasoline, as well as other ammable materials and liquids (adhesives, solvents, paint thinners etc.),
and the vapors they produce are extremely dangerous. DO NOT handle, use or store gasoline or
other ammable or combustible materials anywhere near or in the vicinity of a water heater or any
other appliance. Be sure to read and follow the labels on the water heater, as well as the warnings
printed in this manual. Failure to do so can result in property damage, bodily injury or death.
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Safety Information
DANGER
Flammable Vapors
Vapors from ammable liquids will explode and catch re causing death or severe burns.
DO NOT use or store ammable
products such as gasoline,
solvents or adhesives in the
same room or area near the
water heater.
Water heater has a main burner ame. The
main burner ame:
1. Can come on at any time
2. Will ignite ammable vapors
Keep ammable products:
1. Far away from heater
2. In approved containers
3. Tightly closed
4. Out of children’s reach
Installation:
DO NOT install water heater where ammable products will be stored or used unless the main
burner ame is at least 18” above the oor. This will reduce, but not eliminate the risk of vapors
being ignited by the main burner ame.
Read and follow water heater warnings and instructions. If owner manual is missing, contact the
retailer or manufacturer.
Vapors:
1. Cannot be seen
2. Are heavier than air
3. Go a long way on the oor
4. Can be carried from other rooms to the main
burner ame by air currents.

7
Designed in
Summerville, SC
Support: Support.Eccotemp.com Shop Online: www.Eccotemp.com Phone: [phone]
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PLEASE NOTE: 6GB IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE.
PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.
English
DANGER!
WATER TEMPERATURE SETTING
Safety and energy conservation are factors to be considered when selecting the water
temperature setting. Water temperatures above 125°F can cause severe burns or death from
scalding. The thermostat is adjusted to its lowest temperature position when shipped from the
factory. Be sure to read and follow the warnings outlined on the label pictured below.
The chart shown above may be used as a guide in
determining the proper water temperature for your
home.
DANGER! Households with small children,
disabled, or elderly persons may require a 120°F
or lower temperature setting to prevent contact
with “HOT” water.
Maximum water temperature occurs while burner is
on. To nd water temperature being delivered, turn
on a hot water faucet and place a thermometer in
the water stream and read the thermometer.
The temperature of the water at the outlet of
the water heater can be regulated by setting the
temperature on the Remote Control. The remote
control may have been set at 110°F before it was
shipped from the factory.
NOTICE! When this water heater is supplying general purpose hot water for use by
individuals, a thermostatically controlled mixing valve for reducing point of use water
temperature is recommended to reduce the risk of scald injury. Contact a licensed plumber or
the local plumbing authority for further information.
NOTICE! The factory recommended operating temperatures are between 90°F and 140°F.
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING
Water temperatures over 125°F can cause severe
burns instantly or death scalds. Children, disabled
and elderly are at highest risk of being scalded.
See instruction manual before setting temperature
at water heater. Feel water before bathing or
showering. Temperature limiting valves are avaliable,
see manual.
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Safety Information
Time / Temperature Relationship in Scales
Water Temperature Time to Product a serious Burn
120 More than 5 minutes
125 1 1/2 to 2 minutes
130 About 30 seconds
135 About 10 seconds
140 Less than 5 seconds
145 Less than 3 seconds
150 About 1 1/2 seconds
155 About 1 second
Table courtesy of Shriners Burn Institute

PLEASE NOTE: 6GB IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE.
PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.
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English
DANGER!
NATURAL GAS AND LIQUEFIED PETROLEUM MODELS
Both liquid propane gas (LPG) and natural gas (NG) have an odorant added to aid in detecting a
gas leak. Some people may not physically be able to smell or recognize this odorant. If you are
unsure or unfamiliar with the smell of LPG or NG, ask the gas supplier. Other conditions, such as
“odorant fade”, which causes the odorant to diminish in intensity, can also hide or camouage a
gas leak. Always check with commercial leak detector or soapy water.
• Gas detectors are recommended in LPG and NG applications and their installation should be
in accordance with the detector manufacturer’s recommendations and/or local laws, rules,
regulations or customs.
• Water heaters utilizing LPG are dierent from NG models. A NG water heater will not function
safely on LPG and vice versa.
• No attempt should ever be made to convert the water heater from NG to LPG. To avoid
possible equipment damage, personal injury or re, do not connect the water heater to a fuel
type not in accordance with the water heater data plate; liquid propane gas for LPG water
heaters and natural gas for NG water heaters. These water heaters are not certied for any
other fuel type.
• LPG water heaters should not be installed below grade (for example, in a basement) if such
installation is prohibited by federal, state, or local laws, rules, regulations, or codes.
• LPG must be used with great caution. It is heavier than air and will collect rst in the lower
areas making it hard to detect at nose level.
• Before attempting to light the water heater, make sure to look and smell for gas leaks. Use a
soapy solution to check all gas tting and connections. Bubbling at a connection indicates a
leak that must be corrected. When smelling to detect a gas leak, be sure to sni near the oor
also.
• It is recommended that more than one method, such as soapy solution, gas detectors, ect., be
used to detect leaks in gas applications.
NOTICE! If a gas leak is present or suspected:
• DO NOT attempt to nd the cause yourself.
• DO NOT try to light any appliances.
• DO NOT touch any electrical switch.
• DO NOT use any phone in your building.
• Leave the house immediately and make sure your family and pets leave also.
• Leave doors open for ventilation and contact the gas supplier, a qualied service agency
or the re department.
• Stay away from the house (or building) until the service call has been made, the leak is
corrected, and a qualied agency has determined the area to be safe.
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING
!
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!
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Safety Information

9
Designed in
Summerville, SC
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PLEASE NOTE: 6GB IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE.
PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.
English
WARNING!
For you safety, the information in this manual must be followed to minimize the rise of re
explosion, electric shock, or to prevent property damage, personal injury, or loss of life.
FOR INSTALLATIONS IN THE STATE OF CALIFORNIA
California Law requires that residential water heaters must be braced, anchored or strapped to
resist falling or horizonal displacement due to earthquake motions. For residential water heaters
up to 52 gallon capacity, a brochure with generic earthquake bracing instructions can be obtained
from: Oce of the State Architect, 400 P Street, Sacramento, CA 95814 or you may call 916-445-
8100 or ask a water heater dealer.
However, applicable local codes shall govern installation. For residential water heaters of a capacity
greater than 52 gallons or tankless style, consult the local building code for acceptable bracing
procedures.
SAFETY PRECAUTIONS
Have the installer show you the location of the gas shut-o valve and how to shut it o
if necessary. Turn o the manual shut-o valve if the water heater has been subjected to
overheating, re, ood, physical damage or if the gas supply fails to shut-o.
• Read this manual entirely before installing or operating the water heater.
• Use this water heater only for its intended purpose as described in this Use and Care Manual.
• Be sure your water heater is properly installed in accordance with federal, state, and local
codes and the provided installation instructions.
• All installations and servicing should be referred to a qualied technician.
READ AND FOLLOW THIS SAFETY INFORMATION CAREFULLY
SAVE THESE INSTRUCTIONS
This water heater must be installed in accordance with these local codes, utility company
requirements, and/or in the absence of local codes, use the latest edition of the American National
Standard/National Fuel Gas Code. A copy can be purchased from either the American Gas Association,
400 North Capitol Street NW, Washington, DC 20001 as ANSI standard z223.1 or National Fire
Protection Association, 1 Batterymarch Park, Quincy, MA 02269 as NFPA 54. In Canada, the latest
edition of the CSA B149.1 Natural Gas and Propane Installation, and the Canadian Electrical Code, CSA
C22.1 Part 1, in the absence of local codes.
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING
Safety Information
!


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Installing the 6GB Water Heater

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English
Installing the 6GB Water Heater
LOCATION
• INSTALL INDOORS
• Installation distances may vary by local code. It is the installer’s responsibility to verify installation
requirements.
• Make sure before installation that the gas type you will use is the same type on the data plate.
• Failure to properly install the water heater as outlined in this manual can result in unsafe operation and
possibly voiding the manufacturer’s warranty.
• Water heater cannot be installed in an UN-VENTED bathroom, basement, living room, closet, indoor,
stairway or an exit area. If installed in an exit area, it must be at least 16.5 ft. or more away from the
exit.
• Vent pipe should extend from the wall at least 2”. The terminal must be at least 1.64 ft. away from
obstruction and must be well vented.
• Ensure a backow preventer has been installed to the vent piping.
• Install a condensation trap and drain (as required).
• Vent pipe should slope 3° downward, to avoid condensing water and protect from rain entering.
• Vent pipe should avoid direct, strong wind because the downdraft will cause malfunction.
• The water heater should be installed far from any blockage, and with plenty of space for installation
and maintenance. Adequate clearances for servicing must be provided.
• The water heater should not be installed in the same room with a gas stove.
• When determining the oor clearance, a clearance of 6 inches must be maintained between the vent
pipe and combustible material. A side wall clearance of 6 inches and a top clearance of 12 inches must
be maintained.
• The vent pipe can be up to 32 ft. in length with one elbow.
• The vent pipe should be installed with a ame retardant wall thimble. Owner must refer to vent
manufacturer’s instructions and specications. Eccotemp information can be found at www.eccotemp.
com, please refer to page 24 for additional links. Installation guidelines for venting provided by
Eccotemp, who is solely responsible for venting installation accuracy.
• The power socket connecting the water heater should be grounded properly with a GFCI circuit
protector.
• The water heater should not be located in an area where leakage of the heat exchanger or
connections will result in damage to the area adjacent to it or to lower oors of the structure. When
such areas cannot be avoided it is recommended that a suitable catch pan, adequately drained, must
be installed under the water heater. The pan must not restrict combustion airow.
• The water heater should be installed as close as practical to the vent termination to minimize vent
length and the number of elbows required for venting.
• A gas red water heater or any other appliance should not be installed in a space where liquids which
give o ammable vapors are to be used or stored. Such liquids include gasoline, LPG (butane or
propane), paint or adhesives and their thinners, solvents or removers.
• The water heater should be installed far from heat sources, ammable and dangerous materials.
Because of natural air movement in a room or other enclosed space, ammable vapors can be carried
some distance from where their liquids are being used or stored. The open ame of the water heater’s
main burner can ignite these vapors causing an explosion or re which may result in severe burns,
death or property damage.
• Raising the water heater will reduce, BUT NOT eliminate the possibility of lighting the vapor of any
ammable liquids which may be improperly stored or accidentally spilled.

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• If the water heater is installed in a garage, it should be installed so that the direct ignition system and
main burner are no less than 18 inches above the garage oor.
• Hot and cold water lines should be insulated to conserve water and energy.
• The water heater must be located so it is not subject to physical damage, for example, by moving
vehicles, area ooding, etc.
• The water heater should be installed with the proper venting materials and termination suitable for
Category III venting. Failure to install and properly vent the water heater to the Indoors as outlined
in the Venting Section of this manual can result in unsafe operation. Owner must refer to vent
manufacturer’s instructions and specications. Eccotemp information can be found at www.eccotemp.
com, please refer to page 24 for additional links.
• For other than a direct vent appliance, the appliance must be located as close as possible to a chimney
or gas vent.
• DO NOT install water heater where it will be subject to vibrations.
• DO NOT install water heater in Recreational Vehicles, Mobile Homes, Boats and other Watercraft.
• DO NOT install the water heater near vents for heating or cooling. A minimum of 4 ft. should be
maintained.
• If the clearances stated on the Instruction/Warning Label, located on the front panel o f the heater
dier, install the water heater according to the clearances stated on the label.
WARNING! Combustible construction refers to adjacent walls and ceilings and should not be
confused with combustible or ammable products and materials. Combustible and/or ammable
products and materials should never be stored in the vicinity of this or any gas appliance.
THE VENT FOR THIS APPLIANCE SHALL NOT TERMINATE:
Over public walkways; or
Near sot vents or crawl space vents or other areas where condensate or vapor could create a nuisance or
hazard or cause property damage; or
Where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief
valves, or other equipment.
Installing the 6GB Water Heater
LOCATION
!

CORROSIVE ATMOSPHERES
The air in beauty shops, dry cleaning
establishments, photo processing labs, and
storage areas for liquid and powdered bleaches
or swimming pool chemicals often contain
halogenated hydrocarbons.
An air supply containing halogenated
hydrocarbons may be safe to breathe, but when
it passes through a gas ame corrosive elements
are released that will shorten the life of any gas
burning appliance.
Propellants from common spray cans or gas leaks
from A/C and refrigeration equipment are highly
corrosive after passing through a ame.
The water heater warranty is voided when failure
of the water heater is due to operation in a
corrosive atmosphere.
NOTICE! The water heater should not
be installed near any air supply containing
halogenated hydrocarbons.
!
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English
Installing the 6GB Water Heater
COMBUSTION AND VENTILATION AIR
A conned space is one having a volume of less than 50 cubic feet
per 1,000 BTUH of the aggregate input of all appliances within that
space.
The air must be supplied through two permanent openings of equal
area. One is to be located within 12” above the oor and the other
is to be located within 12” below the ceiling.
The minimum net free area of each opening must not be less than
one square inch per 1,000 BTUH of the total input rating of all
appliances in the enclosure (but not less than 100 square inches), if
each opening communicates with other unconned areas inside the
building.
Proper operation of the water heater requires air for
combustion and ventilation. Provisions for combustion
and ventilation air must comply with referenced codes and
standards.
Buildings of unusually tight construction shall have the combustion and ventilation air supplied from
Indoors, or a freely ventilated attic or crawl space. If air is supplied from Indoors, directly or through
vertical ducts, there must be two openings located as specied above and each must have a minimum
net free area of not less than one square inch per 4,000 BTUH of the total input rating of all the
appliances in the enclosure.
If horizontal ducts are used to communicate with the Indoors, each opening must have a minimum
net free area of not less than one square inch per 2,000 BTUH of the total input rating of all appliances
in the enclosure. If ducts are used, the minimum dimensions of rectangular air ducts shall not be less
than 4”.
NOTICE! If the water heater is installed in an unconned space within a building of
conventional frame, masonry or metal construction, inltration air is normally adequate
for proper combustion and ventilation. If the water heater is installed in a conned space,
provisions for combustion and ventilation air must be made.
NOTICE! If the duct openings which supply combustion and ventilation air are to be covered
with a protective screen or grill, the net free area (openings in the material) of the covering
material must be used in determining the size of the openings. Protective screening for the
openings MUST NOT be smaller than 1/4” mesh to prevent clogging by lint or other debris.
INTACT SHIPMENT
Inspect the water heater for possible damage. Check the markings on the rating plate of the water
heater to be certain the type of gas supplied corresponds to the water heater requirements verify all
included parts are present (see below).
Air
Openings
Min. 200
Sq. In.
Min. 4”
INSTALLATION,USE AND CARE INSTRUCTIONS
WHOLE-HOME TANKLESS WATER HEATER
INDOOR MANUAL
6GB BUILDER SERIES
6GB-ILP
6GB-ING
Apartment/Condos
TinyHouseOffice
Cabins
Shower
MidSize Home
WholeHome Town Home
Use and Care Manual
!

!

3/4” x 1/2” Adapter
x 2 pcs.
Washer
x 2 pcs.
Wood Screw
x 2 pcs.
Anchors
x 2 pcs. Expansion Screw
x 2 pcs.
Gas Shut-O Valve
1 pcs.
3/4” Pressure Relief Valve
1 pcs.
(Included in Canada Shipments Only)

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Installing the 6GB Water Heater
TYPICAL INSTALLATION
1/4” Per Foot Downward Pitch
*Reference Vent Manufacturer
Component Information - Page 19-25
Gas Supply Line
Cold Water
Supply Line
Shut-off Valve
Manual Gas
Appliance
Shut-off
(Supplied)
Sediment Trap
Discharge Line
(To Suitable Drain)
Drain Valve
Pressure
Relief Valve
(Supplied)
To Hot Water
Faucets
Expansion Tank
(If Needed)
Control
Panel
Vent Adapter*
Wall Thimble*
Termination*
NOTICE! The National Fuel Gas Code (NFGC) mandates a manual gas shut-o valve: See
NFGC for complete instructions. Local codes or plumbing authority requirements may vary
from the instructions or diagrams provided and take precedent over these instructions.
!
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English
Installing the 6GB Water Heater
WATER CONNECTION
Plumbing should be carried out by a qualied plumber in accordance with local codes. Use approved
plumbing materials and tools only.
Install a Check Valve between the water heater and the water shut-o valve (see diagram below).
To conserve energy and to prevent freezing, insulate both cold and hot
water supply lines. DO NOT cover the drain valves. Install a shut-o
valve near the inlet of the water heater for service and draining purposes.
Before connecting the water supply pipe to the water heater, open the
shut-o valve and clean out sand, debris, air, caulking material, etc. inside
the pipe. Connect to the water inlet, then check water ow. Close the
shut-o valve and clean the water lter.
If a water heater is installed in a closed water supply system, such as
one having a backow preventer in the cold water supply line, means
shall be provided to control thermal expansion. Contact the water
supplier for local plumbing inspector on how to control this situation.
• With clean, potable water free of corrosive chemicals, sand, dirt, or other contaminates.
• With inlet water temperatures above 32°F, but not to exceed 90°F.
• Free of lime and scale deposits.
• DO NOT reverse the hot and cold water connections. The water heater will not operate.
To ensure proper operation of the water heater, the following water pressure guidelines should be
followed:
• Operation of the water heater requires the minimum water pressure of 14 psi and a minimum
water ow rate of 0.8 gpm.
• Additional water pressure is required for long pipe runs and outlet tting(s) water pressure drops.
• To maintain proper performance, ensure sucient water supply pressure. The Required Water
Pressure = Min. Operating Water Pressure (14 psi) + Pipe Pressure Loss + Faucet and Shower
Pressure Loss + Safety Margin (more than 5 psi).
• To supply hot water to upper oors, additional water pressure (0.44 psi/ft) must be ensured. The
measurement should be calculated by the distance between the water inlet of the water heater
(ground level) to the hot water faucet (upper oor level).
• Well water systems should be set at a range of 50-60 psi.
• When the water is supplied from a water supply tank, the height of the tank and the diameter of
the pipes and their relation to water pressure, should be taken into consideration. Gravity water
pressure is not recommended.
NOTICE! If the water ow resistance of a shower head is too high, the burner in the water heater
will fail to ignite. Keep the shower head clean from debris that could cause additional pressure drop.
NOTICE! If using mixing valves on the outlet, choose one which prevents cold water pressure from
overcoming hot water line pressure.
IMPORTANT! Do not apply heat to the HOT or COLD water connections. Any heat applied
to the water supply ttings will permanently damage the internal components of the water
heater.
DO NOT use pipes with smaller diameters than the water supply connection of the water heater.
Be sure to connect the water inlet and the hot water outlet as shown on the water heater. If reversed,
the water heater will not function.
Installation of unions or exible copper connections are recommended on the HOT and COLD water
lines, so that the water heater may disconnect easily for servicing if necessary.
CAUTION! This water heater must only be used
with the following water supply system conditions:
!

!

!

!

Flow Restrictor
Water Inlet
Filter
Check Valve
Nipple

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English
Installing the 6GB Water Heater
WATER CONNECTION
In regards to the HOT WATER OUTLET:
• Connections between the water heater and point(s) of use should be
as short and direct as possible.
• DO NOT use lead or non-approved plastic pipe.
• To conserve energy and minimize heat loss, insulation of hot water
piping is recommended.
NOTICE! The ow rate of hot water may vary when more than two
faucets (appliances, xtures, etc.) are being used simultaneously.
NOTICE! The pipes MUST be completely drainable. If the hot
water faucets are located at a point higher than the water heater,
place a drain valve at the lowest point (see diagram to the left).
GAS SUPPLY
WARNING! Do not attempt to convert this water heater for use with a dierent type of
gas other than the type shown on the rating plate. Such conversion could result in hazardous
operating conditions. Please have a professional connect the gas pipe.
• The Manual Gas Appliance
Shut-O Valve must be installed
at the gas connection of the
water heater at the same time
of installation (see diagram to
the left).
• The branch gas supply line to
the water heater should be
clean black steel pipe or other
approved gas piping material.
• A ground joint union or ANSI
design certied semi-rigid or
exible gas appliance connector
should be installed in the gas
line close to the water heater.
• The National Fuel Gas Code
(NFCG) mandates a manual gas
shut-o valve: see (NFCG) for
complete instructions.
• If exible connectors are used,
the maximum length shall not
exceed 36”.
• A sediment trap should be
installed at the bottom of the
gas line.
• The inlet gas pressure to the
water heater must not exceed
10.5” w.c. for natural or 14” w.c.
for LPG.
• For purposes of input
adjustment, the minimum inlet
gas pressure (with main burner
on) is shown on the water
heater rating plate. If high or
low gas pressures are present,
contact your gas supplier for
correction.
• It is recommended that the
minimum BTUs in the ex and
gas lines be 1” black steel, ex
rated at a minimum of 150,000
BTUs.
• If lever type gas shut-os are
used, they shall be T-Handle
type.
• The water heater and its
individual shut-o valve must
be disconnected from the gas
supply piping system during
any pressure testing of that
system at test pressure in
excess of 1/2 psi (3.5 kPa).
• The water heater must be
isolated from the gas supply
piping system by closing its
individual manual shut-o valve
during pressure testing of the
gas supply piping system at test
pressures equal to or less than
1/2 psi (3.5 kPa).
DO NOT use excessive force (over 31.5 ft. lbs.) in tightening the pipe, particularly if pipe compound is
used, as the water heater may be damaged.
Compound used on the threaded joints of the gas piping must be of the type resistant to the action
of LPG. Use compound sparingly and use on male threads only.
Hot
Water
Tap
Drain
Valve
Manual
Gas
Supply
Line
Shut-off
Valve
Manual Gas
Appliance
Shut-off
(Supplied)
Union
Sediment Trap
Cap
!

!

!
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English
Installing the 6GB Water Heater
RELIEF VALVE
A new pressure relief valve, complying with the Standard for relief Valves and Automatic Gas
Shut-O Devices for Hot Water Supply Systems, ANSI Z21.22, must be installed at the hot water
outlet connection of the water heater at the time of installation. Local codes shall govern the
installation of relief valves.
For safe operation of the water heater, be sure that:
• The pressure rating of the relief valve must not exceed 150 psi, the maximum working pressure of the water
heater as marked on the rating plate.
• The BTUH rating of the relief valve must equal or exceed the BTUH input of the water heater as marked on its
rating plate.
• No valve of any type should be installed between the relief valve and water heater.
• Discharge from the relief valve should be piped to a suitable drain to eliminate potential water damage.
Piping used should be of a type approved for the distribution of hot water.
• Hot and Cold water lines should be insulated up to the water heater.
• The discharge line must be NO SMALLER than the outlet of the valve and must pitch downward to allow
complete drainage (by gravity) of the relief valve and discharge line.
• The end of the discharge line should not be threaded or concealed and should be protected from freezing.
No valve of any type, restriction or reducer coupling should be installed in discharge line.
NOTICE! The diagram below illustrates a pressure only relief valve. If local codes require a
combination temperature and pressure relief valve be installed, an extension piece may be needed.
NOTICE! Local codes govern the installation of relief valves. If local
codes require that a temperature and pressure relief valve should be
installed the manufacturer recommends a type 40XL Watts T&P relief
valve or an equivalent model be used.
NOTICE! Manual operation of relief valves should be performed at
least once a year. Turn o the electrical power and gas shut-o valve.
Lift and release lever on the relief valve and check the manual operation
of the relief valve. You should take precaution to avoid contact with the
hot water coming out of the relief valve and to prevent water damage.
NOTICE! If the relief valve on the system discharges periodically,
this may be due to thermal expansion in a closed water supply system.
Contact the water supplier or local plumbing inspector on how to
correct this situation. Do not plug the relief valve.
Cold Water
Supply Line
Shut-off Valve
Pressure
Relief Valve
(Supplied)
Discharge Line
(To suitable drain)
Hot Water
Supply
Outlet
Cold Water
Supply Line
Shut-off Valve
Manual Gas
Appliance
Shut-off
(Supplied)
Sediment Trap
Discharge Line
(To Suitable Drain)
Pressure
Relief Valve
(Supplied)
!

!

!

!


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English
The water heater and its gas connections must be leak tested at normal operating pressures
before it is placed in operation.
• Turn on the gas shut-o valve(s) to the water heater.
• Use a commercial leak detector or soapy water solution to test for leaks at all connections
and ttings. Bubbles indicate a gas leak that must be corrected.
All connections should also be leak tested after the water heater is placed in operation.
PRESSURE TESTING THE GAS SUPPLY SYSTEM
WARNING! Install a gas pressure regulator, in the gas supply line, which does not exceed
the maximum supply pressure.
DO NOT use an individual type gas regulator.
The water heater must be isolated from the gas piping system by closing the manual gas shut-o
valve during any pressure testing of the gas supply piping at pressures equal to or less than 1/2 psi
(14’w.c.).
HIGH ALTITUDE
The Eccotemp 6GB Builder Series Gas Tankless Water Heater has been tested for use at elevations up
to 2000 ft. Installation and use of the Eccotemp 6GB above 2000 ft. may eect overall eciency and
performance. Installation and use of the Eccotemp 6GB above 2000 ft. is not recommended.
LEAK TESTING
WARNING! Never use an open ame to test for gas leaks, as property damage, personal
injury, or death could result.
!

!

Installing the 6GB Water Heater

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English
Installing the 6GB Water Heater
VENTING
DANGER! Failure to
install the vent adapter
and properly vent the
water heater to the
Indoors as outlined in
the Venting section of
this manual will result
in unsafe operation
of the water heater
causing death, serious
injury, explosion, or
re. To avoid risk of
re, explosion, or
asphyxiation from
carbon monoxide,
NEVER operate the
water heater unless it
is properly vented and
has adequate air supply
for proper operation as
outlined in the Venting
section of this manual.
WARNING!
Use UL approved
Category III Stainless
Steel vent material
only. No other vent
material is permitted.
Owner must refer to
vent manufacturer’s
instructions and
specications.
Eccotemp information
can be found at www.
eccotemp.com, see
page 24 for additional
links.
WARNING! Refer to
page 24 for clearances
to combustible
material.
The installation of venting must
comply with national codes, local
codes, and the vent manufacturer’s
instructions. Owner must refer to
vent manufacturer’s instructions and
specications. Eccotemp information
can be found at www.eccotemp.com,
please refer to page 24 for additional
links.
The water heater must be vented to
the Indoors as described in these
instructions. DO NOT connect this
water heater to an existing vent
or chimney, it must be vented
separately from all other appliances.
Eccotemp also recommends adding a
backow preventer to keep freezing
outside air from reaching the water
heater. Consult with an installation
professional for proper installation.
All vent components (adapters, pipe,
elbows, terminals, etc.) should be UL
1738 Certied Stainless Steel Venting
Material (e.g. AL29-4C).
The specied vent termination must
be used. The termination should be a
90° elbow type with screen (refer to
page 24).
Use a vent pipe with an
antidisconnection structure.
The use of a high temperature
silicone (500’ F) may be required to
seal vent connections. To prevent
accidental gas exhaust leakage, apply
a 1/4” wide bead approximately
1/4” from the end and another bead
against the joint side of the stop
bead.
Follow vent manufacturer’s
installation instructions.
The water heater can be vented either
horizontally or vertically.
Vent pipe runs must be adequately
supported along both horizontal and
vertical runs.
The maximum recommended
unsupported span should be no more
than ve (5) feet. Support isolation
hanging bands should be used. DO
NOT use wire (see diagram below).
VENTING THROUGH CLOSED SPACES
If the vent piping passes through a closed space, wrap the vent pipe with inammable insulation
material that is at least 3/4” thick. DO NOT let the insulation material make contact with ammable
materials. A minimum clearance of 6” between the vent pipe and ceiling should be maintained. Follow
local codes.
For maintenance and inspection purposes, the following holes are required to be made:
• Two (2) inspection openings that allow access to venting. One (1) of these openings should be
close to where the vent pipe enters the ceiling. The other opening should never be near the vent
termination.
• A ventilation hole with a 16 sq. in. opening should be made at least every 10 ft.
NOTICE! Vent pipes must be completely insulated with inammable materials when
installed in alcoves, closets, and garages and must not touch any ammable material.
NO! YES!
Wall Thimble
Insulation
Material
1/4” per Foot
Downward Slope
Vent Pipe
Ceiling Board
Inspection
Hole #1
Inspection
Hole #2
*Reference Vent Manufacturer
Component Inormation - Page 37
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PLEASE NOTE: 6GB IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE.
PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.
20
20 Support: Support.Eccotemp.com Shop Online: www.Eccotemp.com Phone: [phone]
English
Owner must refer to vent manufacturer’s instructions and specications. Eccotemp information can be
found at www.eccotemp.com and on page 24.
Installing the 6GB Water Heater
MAXIMUM VENT LENGTH
DRAINING THE CONDENSATE
In certain conditions, installations in unconditioned space or having long horizontal or vertical runs
may accumulate condensate.
Condensate is known to be acidic; refer to local, state (provincial) or federal codes for propper
handling methods.
In order to prevent condensate from draining back into the water heater, we recommend a
condensate trap and drain to be installed in a horizontal vent section as close as practical to the water
heater vent connection.
Not following proper condensate procedures will void warranty.
Eccotemp also recommends adding a backow preventer to keep freezing outside air from reaching
the water heater. Consult with an installation professional for proper installation.
The system will not operate is there is excessive restriction (pressure
drop) in the venting system. A maximum of 32 ft. of vent pipe may
be used provided there is only one 90° elbow in the system. If
additional elbows are required: two elbows can be used with 27 ft.,
and three elbows can be used with 23 ft. of vent pipe.
A 90° elbow is equivalent to 5 ft. of straight pipe. A 45° elbow is
equivalent to 2ft. 6 inches of straight pipe.
The termination elbow does not count as an elbow when
determining total vent lengths.
The vent must be installed with a slight downward slope of 1/4”
per ft. of horizontal run toward the vent terminal (see diagram
below). This ensures that any condensate formed during operation is
evacuated from the water heater.
A 1/4” per foot upward slope is acceptable when it is not possible
to vent with a downward slope, however, a UL approved Category III
Stainless Steel condensate trap MUST be installed at the beginning
of the horizontal run (See PG. 19 “Typical Horizontal Termination w/
1/4” per foot UPWARDS Slope” or PG. 24, “Standard Vertical Vent
Termination” for examples.)
The venting may be as short as 12”,
provided one vent termination is
installed to the outdoors through a
sidewall, one 90° elbow is included in
the installation, and the wall thimble is
installed.
NOTICE! Make sure that the seam
of the vent pipe in horizontal runs
is toward the top of the installation
(see diagram to the left).
One (1) 90° Elbow is
Equivalent to 5 ft. of
Straight Pipe.
Number of
90° elbows
(bends)
Maximum
Length of
Straight Pipe
1
2
3
32’
27’
22’
Vent Seam
Max. 2 ft.
More than 6”
1/4” per ft.
Downward Slope
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MINIMUM VENT LENGTH