Roth EcoDWT plus 3 User manual

EcoDWT plus 3
Installation Instructions
For Lubricating and Hydraulic Oil Storage and Dispensing
Listed under UL Standard SU2258
Meets the requirements of
ANSI/NFPA 31
ANSI/NFPA 30
NFPA 30a
CSA B-139-04
Roth Industries
268 Bellew Ave South
Watertown, NY 13601
USA Contact Info: Canadian Contact Info:
Toll Free: 888-266-7684 Toll Free: 800-969-7684
Fax: [phone] Fax: [phone]
E-mail [email protected] E-mail: [email protected]
www.roth-america.com

Roth DWT Installation Manual 2 Lubricating & Hydraulic Oil Storage and Dispensing
Table of Contents
Section 1 - The Roth Industries EcoDWT plus 3 Double Wall Tank
Construction
Models and Specications
Third Party Testing and Approvals
Installation Training
Warranty Terms and Product Registration
Section 2 - Installation Parts And Accessories
Parts Supplied with Tank
Dispensing System Installation Accessories
Section 3 - Pre-Installation
Permits and Approvals
Warnings and Cautions
Tank Unpacking and Inspection
Section 4 - General Installation Instructions
Site Selection
Locating the Tank
Tank Base Installation
Flood and Earthquake Considerations
Tie Down Kit
Piping Connections
Normal and Emergency Venting
Testing and Inspection
Section 5 - Hose Reel Bracket and Hose Reel Instalation
2” Metal Adaptor
Hose Reel Bracket Assembly
Hose Reel
Section 6 - Completed Installation Review and Warranty Documentation
Section 7 - Yearly Maintenance and Troubleshooting
Yearly Maintenance
Troubleshooting
Fill Chart
Page 3
Page 3
Page 4
Page 5
Page 5
Page 6
Page 7
Page 7
Page 8
Page 9
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Page 10
Page 11
Page 11
Page 12
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Page 13
Page 13
Page 14
Page 15
Page 16
Page 17
Page 17
Page 17
Page 20
Page 21
Page 22
Page 22
Page 23
Page 25

Roth DWT Installation Manual 3 Lubricating & Hydraulic Oil Storage and Dispensing
Section 1 - The Roth Industries EcoDWT plus 3 Double Wall Tank
Construction
1. The Roth EcoDWT plus 3 storage tank is a double wall tank (DWT) providing both primary
and secondary containment tanks for #2 fuel oil, diesel fuel, bio-fuels up to B20, and
both new and used automotive motor oils. It is engineered to be the nest fuel storage
tank available for residential and light commercial use and one that will provide decades of
trouble free service.
2. As the name indicates, it is the ecologically sound choice for fuel oil storage, additionally
providing three distinct advantages ( the “plus 3”) over common single wall tanks: superior
re protection over most single wall tanks by keeping the oil cooler and therefore less stress
on the tank seams, as shown in UL re tests; the combination of a steel tank encasing
a plastic tank protects the fuel oil products, particularly bio-fuels, with the best light and
diffusion barrier; when properly secured in place, the double wall tank provides excellent
safe fuel oil storage in ood prone locations, a record established in over forty years of use.
3. The primary containment tank is made of high density polyethylene resin and is formed
by a rigorously controlled blow molding process. Polyethylene is a material that combines
exibility with very high resistance to the corrosive effects of both acids and water. Acids are
found in all fuel oil products and are, in combination with water, the primary cause of steel
tank failure. Water is commonly found in fuel oil storage tanks from water vapor, introduced
by the vent piping primarily during the emptying of the tank, condensing inside the tank
as the air cools when in contact with the cooler oil. The use of polyethylene, with its high
resistance to corrosion, essentially eliminates the foremost reason for failure.

Roth DWT Installation Manual 4 Lubricating & Hydraulic Oil Storage and Dispensing
4. The secondary containment tank is made with 19 gauge galvanized steel. The use of steel
offers strength to resist damage to the inner tank from impacts by other objects, rigidity
to support the exible inner tank, and the ability for electrical grounding of the tank where
required by local code. The outer tank sides and bottom are formed from one sheet of steel,
which is then shaped to receive the panels used at each end of the tank. The seams are
caulked and then rolled in a three step robotic procedure, producing a strong, uid tight and
weld-free joint.
5. Each inner and outer tank is tested for defects and liquid tightness. The inner tank is
pressure tested to 4.35psi. It is also weighed to make sure it contains the correct amount
of material, and nally measured ultrasonically at critical points to verify that it has the
required wall thickness. Each sheet of steel for the outer tank is inspected for damage
or blemishes that could compromise the galvanized coating. Once the outer tank is
assembled, it is pressure tested to .25 - .30psi to ensure the integrity of its seams. The
inner tank is then placed inside the outer tank, gaskets placed around the four openings of
the inner tank, and the outer tank top installed, riveted into place, and its edge rolled. The
leak detector, #3 gaskets, plastic and die-cast metal adaptors, cap nuts and dust plugs are
then installed, labels afxed, the warranty packet and tank base placed on top of the tank,
and nally a protective plastic shrink wrap is put over the top of the completed tank.
6. The completed tank has four connections at the top and, unlike a standard steel tank and
most other poly tanks, none elsewhere. By eliminating a connection below the oil level in
the tank, a potential source of leakage is eliminated. The four connections can be used
interchangeably, providing the installer with greater exibility in accommodating difcult or
unusual piping installations.
Models and Specications
Tank Model DWT 400L DWT 620L DWT 1000L DWT 1000LH DWT 1500L
Nom. Capacity
US gal (liters) 110 (400) 165 (620) 275 (1000) 275 (1000) 400 (1500)
Length
inches (cm) 29 (74) 29 (74) 43 (110) 51 (130) 64 (163)
Width
inches (cm) 28 (72) 28 (72) 28 (72) 30 (76) 30 (76)
Height
inches (cm) 44 (112) 61 (155) 61 (155) 54 (137) 68 (173)
Min. Height Req’d
inches (cm) 49 (125) 66 (168) 66 (168) 60 (152) 76 (193)
Weight
lbs (kg) 106 (48) 132 (60) 167 (76) 208 (94) 333 (151)
Shipping Weight
lbs (kg) 115 (52) 143 (65) 185 (84) 230 (104) 358 (162)

Roth DWT Installation Manual 5 Lubricating & Hydraulic Oil Storage and Dispensing
Approximate Footprint for Multiple DWT Installations
Tank Model DWT 400L DWT 620L DWT 1000L DWT 1000LH DWT 1500L
2 Tanks Side by
Side
inches (cm)
29 X 60
(74 X 152)
29 X 60
(74 X 152)
43 x 60
(110 x 152)
51 x 63
(130 x 160)
64 x 63
(163 x 160)
2 Tanks Side by
Side
inches (cm)
29 X 92
(74 X 234)
29 X 92
(74 X 234)
43 x 92
(110 x 234)
51 x 96
(130 x 244)
64 x 96
(163 x 244)
2 Tanks Side by
Side
inches (cm)
29 X 124
(74 X 315)
29 X 124
(74 X 315)
43 x 124
(110 x 315)
51 x 129
(130 x 328) N/A
2 Tanks Side by
Side
inches (cm)
29 X 156
(74 X 397)
29 X 156
(74 X 397)
43 x 156
(110 x 397)
51 x 162
(130 x 411) N/A
2 Tanks End to End
inches (cm) N/A N/A 28 x 90 (72 x 229) N/A N/A
Third Party Testing and Approvals
1. The primary U.S. code governing fuel oil tank manufacturing and installation is the National
Fire Protection Association (NFPA) code, Section 31.
2. The corresponding Canadian code is CSA B-139-09.
3. The primary US Codes governing lube oil storage and dispensing are National Fire
Protection Association (NFPA) Section 30 & 30A.
4. The Roth EcoDWT plus 3 has been tested by both the U.S. and Canadian divisions of
the Underwriters Laboratories (UL). As a result of passing stringent re and safety tests,
the Roth EcoDWT plus 3 is listed under UL standard SU2258 and each tank bears the
UL mark - c UL us.
5. The scope of UL standard SU 2258 extends to tanks intended for installation and use
in accordance with ANSI/NFPA 30, the Flammable and Combustible Liquids Code and
ANSI/NFPA 30A, the Code for Fuel Dispensing Facilities and Repair Garages.
Installation Training
1. To ensure the highest level of operation and customer satisfaction, Roth Industries
encourages each installer to receive training in the proper installation of a Roth tank.
2. This training is offered through the network of manufacturer’s representatives that Roth
maintains, allowing installers to receive training in their immediate area.
3. Training materials are also available on the Roth Industries website:
www.roth-america.com

Roth DWT Installation Manual 6 Lubricating & Hydraulic Oil Storage and Dispensing
Warranty Terms and Product Registration
1. Under the terms of the warranty, Roth Industries warrants the Product against leakages
caused by defects in materials and workmanship for a period of thirty (30) years from the
“Start Date”.
2. During the rst ten (10) years of the warranty period, Roth shall (i) at its discretion, either
repair the Product or provide a replacement product of similar size, design and quality,
and (ii) pay all labor costs associated with such repair and/or replacement, all of which
shall be at Roth’s expense up to a maximum of one thousand ($1,000) USD in each case.
Purchaser shall be responsible for payment of the costs of shipping, freight and insurance
on any replacement product, all of which shall be at Purchaser’s expense.
3. In addition, during this rst ten (10) year period ONLY, in the event that all conditions
contained in the Limited Warranty are otherwise satised, Roth shall also reimburse
purchaser, up to a maximum amount of US $2 million, for the costs and expenses
incurred by Purchaser for damage to purchaser’s property directly and proximately
caused by a leakage of oil from a defective Product.
4. During years eleven (11) through year thirty (30) of the warranty period, Roth shall, at
its discretion, either repair the Product or provide a replacement product (or 100% credit
towards the purchase price of a replacement product) of similar size, design and quality.
Purchaser shall be responsible for payment of all labor costs associated with such
repair and/or replacement, as well as the costs of shipping, freight and insurance on any
replacement product, all of which shall be at Purchaser’s expense.
5. The warranty period (“Start Date”) begins at the date of installation of the Product as
recorded on the warranty card and submitted to Roth after installation. If the warranty
card is not submitted, the warranty period (“Start Date”) begins at the date of manufacture
of the Product. THIS LIMITED WARRANTY SHALL BE VOID IF THE PRODUCT IS NOT
INSTALLED WITHIN TWELVE (12) MONTHS AFTER THE DATE OF SALE BY THE
PURCHASER (DISTRIBUTOR) TO THE INSTALLER.
6. Though statements above are a part of the warranty statement, they do not reect all
warranty conditions. Please read the limited warranty certicate to be informed of all
conditions and rights.

Roth DWT Installation Manual 7 Lubricating & Hydraulic Oil Storage and Dispensing
Section 2 - Installation Parts and Accessories
Parts Supplied with Tank
Quantity Part # Description
4 - Threaded Dust Plug
4 2350000024 Plastic Cap Nut
4 2350006801 2” NPT Die-Cast Metal Adaptor
4 2350000031 #3 Gasket
4 2350005738 Bulkhead Nuts
1 Various Leak Detector
1 -
Installation Packet including Warranty
Certicate Forms (2), Parts Check List
& Installation Instructions
1 Various Tank Base
Threaded Dust Plug (4)
(Discard when ready to begin installation)
#3 Gasket (4)
2” NPT Metal Adaptor (4)

Roth DWT Installation Manual 8 Lubricating & Hydraulic Oil Storage and Dispensing
Dispensing System Installation Accessories
Non-Roth components used in this image and subsequent images to not indicate a sole source agreement between
Roth Industries, Inc. and any other manufacturer. Components used are typical but may be substituted with other
compatible components. Contact Roth Industries Technical Department for compatibility requirements.
Hose Reel Bracket w/ Hardware
Pre-fabricated steel bracket designed to t atop the Roth EcoDWT Plus 3 tanks. Hardware contains
bolts, nuts and washers to fasten bracket to tank and to fasten hose reel to bracket.
The bracket can be modied to accept hose reels from different manufacturers. Additional hardware may
be required. Contact the Roth Industries technical department to discuss these requirements.
Tie Down Kits
Used to keep tank and accessories from shifting or tipping over during use. See instructions on page 14
for complete details.
2” Metal NPT Adaptors
Four (4) metal 2” Female NPT adapters are furnished with the tank
Tank Size Hose Reel Bracket
w/ Hardware Tie Down Kit
110 Gal 2315000201 - 26” (1) 2335000222
165 Gal 2315000201 - 26” (1) 2335100222
275 Gal 2315000201 - 26” (1) 2335100222
275 Gal LP 2315000202 - 28” (2) 2335200222
400 Gal 2315000202 - 28” (2) 2335400222

Roth DWT Installation Manual 9 Lubricating & Hydraulic Oil Storage and Dispensing
Section 3 - Pre-Installation
It is very important to read and familiarize yourself with these instructions before
installing the tank(s). There are a number of steps that are crucial to a successful
installation and to maintaining the warranty.
Permits and Approvals
Installing a single Roth EcoDWT plus 3 inside a building is a straightforward process.
Nearly all municipalities have codes governing the installation and use of oil tanks.
Always consult with the code ofcers and inspectors before installing a Roth EcoDWT
plus 3 to be sure you are in compliance with all applicable local codes and have
obtained all required permits. Code ofcers may be unfamiliar with the Roth double wall
tank, so time taken in acquainting the ofcer(s) with the tank’s unique advantages and
certications will usually make nal approval much easier.
Warnings and Cautions
To the Wholesaler:
1. Fully inspect the tank for shipping damage. The tanks are inspected for damage before
shipment from the manufacturing facility and must be inspected for shipping damage upon
delivery. If damage is found, the shipping company, not Roth Industries, must be notied.
2. Do not remove shrink wrap covering unless it will be replaced with similar material.
3. Do not store tanks outside without shrink wrap covering to prevent water seepage into the
interstitial space between the two tanks and to prevent the destruction or loss of the supplied
warranty materials.
4. Tanks should not be stored outside or uncovered for more than thirty (30) days to prevent
UV degradation of plastic materials
5. Conrm that the warranty package is with the tank. It is located on top of the tank under the
shrink wrap and easily visible. If it is missing contact Roth for a replacement package.
To the Installer:
1. Do not remove the shrink wrap until the tank has either been moved inside or is ready to
have the cover placed on it if an outside installation.
2. Failure to follow the instructions given in this installation manual may:
a. Void the tank warranty.
b. Compromise the structural integrity of the tank, requiring its replacement.
c. Result in personal injury and/or property damage.
d. Make the installer liable to penalties under applicable state and local law.
4. Do not install without obtaining appropriate permits and approvals.

Roth DWT Installation Manual 10 Lubricating & Hydraulic Oil Storage and Dispensing
5. Always install the Roth tank according to applicable building and health codes for oil storage
systems.
6. Do not install equipment greater than 10 lbs. (4.5 kg.) directly on the tank connections
without external support
Tank Unpacking and Inspection
1. The top and upper portions of the Roth EcoDWT plus 3 are covered with shrink wrap plastic
designed to keep the top of the tank weathertight. The shrink wrap must be left in place
until the tank has been moved inside or is ready to have the cover placed on it if an outside
installation. It is transparent, so the tank top and connections can be examined for damage.
The base for each tank is shipped on top of the tank to protect the ttings during shipping.
2. The tanks are inspected for damage before shipment from the manufacturing facility and
must be inspected for shipping damage upon delivery. If damage is found, the wholesaler or
shipper, not Roth Industries, must be notied.
3. In the course of shipping and handling after the tanks leave the Roth warehouse, some
minor denting and scraping of the tanks may occur. Minor scratches and scrapes on the
surface of the galvanized steel outer tank can be easily repaired by cleaning the surface
with any common degreaser and then coating the affected area with any zinc bearing paint
designed for such repairs. Most hardware and building supply stores will carry one or more
brands of galvanizing repair products.
4. Dents of a ¼ inch depth or less above the curved portions of the sides or in the end panels
are generally considered minor and will not affect the integrity of the tank. If the deepest part
of the dent forms a sharp projection against the inner tank, or if the dent is on or below the
curved sides, this can abrade the surface of the inner tank over time and weaken it. A tank
damaged in this way should not be used.
5. If the rolled seam has been struck and is distorted to the left or right ¼ inch or less, the
sealing compound will still be intact. Any seam distorted more than ¼ inch or directly dented
in will have the sealing compound compromised and should not be used. Any tank installed
with unacceptable dents will not be covered by the warranty.
Contact the Roth Industries Technical Department if you have any questions concerning
dents or scraping on the units. Typically, you will be asked to send pictures of the tank.

Roth DWT Installation Manual 11 Lubricating & Hydraulic Oil Storage and Dispensing
Section 4 - General Installation Instructions
Site Selection
The Roth EcoDWT plus 3 must be installed indoors for this application.
The following standards must be met:
(Always check local building and re codes for specic requirements in your location.)
1. Level surface - The Roth EcoDWT plus 3 is an upright tank having a higher center of
gravity than a standard single wall tank. This design allows a smaller footprint than a typical
single wall tank. The result is also a taller tank prole, requiring the tank to be installed so
that it is plumb to within a ½ inch of vertical, as checked on both an end and a side. If the
tank is not plumb the proper alignment of piping connections will prove difcult, especially
with the use of expansion kits for multiple tank setups. The accuracy of the fuel gauge and
the correct operation of the vent whistle will also be affected. If the tank is more than ½ inch
out of plumb, the surface must be leveled with an appropriate leveling compound or the
product warranty is void.
2. Weight bearing capacity - Since #2 fuel oil weighs 7.2 lbs/gallon, a model 1000L (275
gal.) tank will hold approximately 1730 lbs when full, which brings the total weight of the
tank to about 1900 lbs or just short of a ton. Since the model 1000L has a footprint of 8.3
ft2, this means the load bearing surface is carrying about 227 lbs/ft2. NFPA 31-7.3 and CSA
B-139-09: 7.3.8 have specic requirements for oil tank foundations that must be followed.
The base for the Roth DWT requires full contact support under each of the tubular legs to
produce a properly stable installation. Use of masonry blocks such as pavers, sidewalk
blocks, and cement wall blocks will not provide sufcient support and will void the warranty.
3. Minimum clearance - A minimum of 2 inches of clearance is needed between the Roth
EcoDWT plus 3 and any wall, post, or other permanently installed structural member,
support, or barrier. When the tank is lled with oil, its sides could expand horizontally as
much as 2 inches, so the clearance is required to prevent contact between, and undue
pressure being applied to, either the tank side or the structure next to it. This distance also
allows for inspection of the tank sides. CSA B139-09: 7.3.5 states that a minimum clearance
of 460 mm (18 in) be made along one side and one end for service accessability. The tank
dimensional tables give the minimum height needed for installation, but it is recommended
that there be a minimum clearance over a tank of 2 feet to permit removal and reinstallation
of the single use leak detector, if necessary.
4. Proper drainage - Although the Roth EcoDWT plus 3 outer tank and base are made from
galvanized steel with a minimum expected life span of 30 years with normal use, prolonged
exposure to water and water-borne salts and/or acids can signicantly reduce that life span.
It is very important that the tank installation site has good drainage, and that the surface the
tank rests on is dry for the majority of the time. Any water from wash areas or water softener
units must be directed away from where the tank is located.

Roth DWT Installation Manual 12 Lubricating & Hydraulic Oil Storage and Dispensing
5. Locating the Tank
1. Make sure the tank will t through all doors, stairs, halls, and turns taken to reach its
intended placement. The tank cannot be dismantled or otherwise altered to make it t
through smaller spaces and any attempt to do so will destroy its structural integrity as well
as void the warranty.
2. Examine the desired tank location for deciencies in the load bearing surface, such as
irregularities, slope, and dampness. If a level pad will be poured on the existing oor, it
should extend 6 inches past all exposed sides of the tank.
3. The tank must not be installed closer than 5 feet to the heating appliance (NFPA 31 – 7.5.6)
and cannot obstruct access to other utilities’ panels, meters, or control valves.
4. Because the connection points of the inner polyethylene tank project above the outer tank
top, the DWT must not be installed near a window that will allow exposure to sunlight (UV
radiation) on these connections. Although the polyethylene does have limited UV inhibitors
in it, prolonged exposure to sunlight can start breaking down the exposed plastic. The same
precaution applies to the clear plastic cover on the leak detector.
5. After the site is prepared, remove shrink wrap and other packing materials and thoroughly
inspect the tank and accessories for any hidden damage or missing parts. If damaged,
contact the wholesaler the tank was purchased from for resolution.
6. Once the inspection is complete, the installation can begin. Each tank has 4 connection
ports on the top. These can be used interchangeably during installation for the various tank
ttings, providing maximum exibility for the planned connections.
The certication label on the tank should be visible after installation.
Tank Base Installation
1. The Roth EcoDWT plus 3 uses a one piece base assembly, known as a cradle base,
for support. This base is shipped on top of the tank to provide protection for the tting
connections and is held in place by the shrink wrap plastic.
2. The base consists of two or more steel tubular “legs” running horizontally the full width of the
tank with the cradle assembly attached to them. The design of the base requires the legs
to be in contact with the oor for their entire length, or distortion and possible failure of the
base can occur.
3. Once the site is ready for the tank to be set in place, simply set the base on the oor in the
approximate location the tank will be installed and place the tank on the base. There is no
need to connect the base to the tank, as it is designed to lock in place when the tank is lled
with oil. Once the tank is on the base, the unit can be easily slid to its permanent location,
allowing for proper clearances.
Failure to use the base may result in tank failure and will void the warranty.

Roth DWT Installation Manual 13 Lubricating & Hydraulic Oil Storage and Dispensing
Flood and Earthquake Considerations
1. Always consult local codes and regulations regarding above ground oil storage tank
installations in earthquake or ood prone areas. For seismic rated anchoring requirements
contact the Roth Technical Department
2. In areas where a threat of ooding or high winds exists, or in basements with a history of
ooding, use of the Roth tie-down kits is recommended.
Tie Down Kit
Tie Down Kits are required with Hose Reel Application
1. Tie down kits are used as an aid to keep the tanks from shifting, tipping over or oating off
the base.
2. The kit includes two tie downs, one for each side of the tank. Each tie down consists of long
and short support rods with hooks on each end, turnbuckle and pre-drilled angle bracket.
3. Place long support rods onto the top rim of the tank. Hook the turnbuckle onto the long and
short support rods. Hook the angle bracket onto the short support rod. Adjust the turnbuckle
until the angle bracket touches the concrete and mark the fastening holes.
4. Anchor angle brackets to cement with eld supplied fasteners. Loosen turnbuckle until short
support rod can be hooked onto angle bracket. Tighten turnbuckle on each side evenly in an
alternating pattern. Kits should be tight without deforming tank rim or sides of tank. Do not
overtighten.
Front, Rear View Side View
Fig 3.1 Fig 3.2

Roth DWT Installation Manual 14 Lubricating & Hydraulic Oil Storage and Dispensing
5. Be sure tank remains level during and after tightening the tie down kits.
6. Tie down kits may not be effective if the tank is less than half full and a ooding event
occurs. In areas with a risk of ooding, please contact Roth Industries Technical Department
to determine best method for securing tank.
7. Use one kit for 400L, 620L, &1000L tanks Use two kits for 1000LH & 1500L tanks.
8. Additional kits maybe used to increase stability or where conditions or code require it.
Piping Connections
1. All connections to the Roth EcoDWT plus 3 use a at rubber #3 gasket to seal against the
tank opening and to ensure the connection is odor free. The various ttings are secured
to the tank with a large black plastic cap nut. Once installed, 18 ft-lb of torque applied to
the cap nut seals the connection; hand tightening is the acceptable equivalent of this. The
connections to the tank are designed to seal against atmospheric pressure only and not the
higher uid or pumping pressures. It can not be considered an oil tight connection. In the
event the tank is overlled, the connection may allow oil to seep onto the top of the tank.
2. Do not use pipe sealants or PTFE tape on any threaded plastic connections, as these
products can cause the plastic to degrade. These sealants can be used on metal to metal
connections.
Tie Down Kit Tie Down Kit
Caution:
Tank restraints must not affect the containment properties of the tank. Penetrating fasteners are only
allowed on the tank ange above the tank top.

Roth DWT Installation Manual 15 Lubricating & Hydraulic Oil Storage and Dispensing
Normal and Emergency Venting
All atmospheric storage vessels require venting to prevent:
• Tank pressure accumulation while lling with liquid
• Tank vacuum accumulation while emptying tank
Normal Venting
Normal vents function to allow the tank interior pressure to remain at or very near
atmospheric during lling and emptying operations. Codes and ordinances may allow
simple open vents for meeting this requirement. This requirement can be met with a 2 in.
pipe nipple and a screened vent cap.
In some locations, normally closed or pressure-vacuum vents may be required. This type of
vent includes two valve assemblies, one designed to relieve accumulated pressure, another
to relieve accumulated vacuum. When the tank is not being lled or emptied, both valves
are closed retaining any vapor associated with the stored liquid. This type of vent also
allows the tank to “breathe” with changes in ambient temperature resulting in small internal
pressure changes.
Normal vents should be sized with consideration for maximum ll and emptying rates.
In most cases, using vent sized to mount directly on the 2 in NPT adapter will meet
these requirements.
Example of an “open” normal vent
Example of a normally closed pressure vacuum vent, image courtesy of Morrison Bros. Co.

Roth DWT Installation Manual 16 Lubricating & Hydraulic Oil Storage and Dispensing
Emergency Venting
Emergency venting allows the expanding interior atmosphere of the tank to escape in
the event that the tank is exposed to external re. Emergency vents are designed to
open at a pressure slightly above the opening pressure of normal vents.
The Roth DWT can be equipped with emergency vents for the primary tank. Sizing
of emergency vents is a function of the calculating the wetted surface area of the tank
and associated vent ow capacity requirements per NFPA 30. Please contact Roth
Industries Technical Department for assistance in sizing emergency vent equipment.
Interstitial emergency venting
Codes and ordinances may require emergency venting be applied to the interstitial
volume (space between the inner tank and the outer tank) in tanks with double wall
construction. The Roth DWT is constructed as a closed diked double wall tank with a
non-sealed interstitial, not designed for or capable of retaining pressure. Therefore,
there is no requirement or facility to install an emergency vent on the interstitial.
Testing and Inspection
1. As mentioned in Section 1, the inner and outer tanks of the Roth EcoDWT plus 3 are
pressure tested at the factory to UL specications (4.35 psi inner and 0.25 - 0.3 psi outer).
Further pressure testing is not necessary and can result in damage to the tanks if attempted.
2. If pressure testing of the piping is required by local codes, all affected piping should be
disconnected from the tank and one end sealed prior to performing testing. Pressurization
of the piping should be no more than 0.5 psi (3.5 kPa) using a leak detection solution on the
ttings
3. A hydrostatic test consisting of a thorough inspection of all connections during the rst lling
should be conducted.
4. Leaks found during these tests are generally from misaligned piping and loose ttings, or, on
rare occasions, from defective ttings. Once the problem has been identied and corrected,
review all aspects of the installation.
Example of an emergency vent, image courtesy of Morrison Bros. Co.

Roth DWT Installation Manual 17 Lubricating & Hydraulic Oil Storage and Dispensing
2” Metal Adaptors
1. Remove dust plugs and discard.
2. When attaching ttings/equipment to the 2”
metal adaptors, loosen large plastic cap nut to
prevent cracking. When securing adaptors to
tank with cap nuts. Hand tighten only. Do not
exceed 18 ft. lbs. of torque.
Hose Reel Bracket Assembly
Bracket and Installation Hardware Kit
Hardware Kit (exploded view)
The following images and descriptions are meant to provide a general reference for mounting ttings and
required accessories to the Roth DWT Tank and Reel Bracket. Specic installation sites may require the use
of different accessories or accessories to be mounted in different positions on the top of the tank which in no
way adversely affects the function of the tank.
Section 5 - Hose Reel Bracket and Hose Reel Installation
PPT - 21

Roth DWT Installation Manual 18 Lubricating & Hydraulic Oil Storage and Dispensing
1. Place bracket on top of tank and center over
tank openings.
2. Insert bolt through pre-drilled hole in bracket
leg.
3. Slide mounting clipover bolt with the curved
edges facing the tank and bracket.
4. Place elastic stop nut on bolt

Roth DWT Installation Manual 19 Lubricating & Hydraulic Oil Storage and Dispensing
5. Secure clip with elastic stop nut and tighten.
6. Be sure clip is seated rmly on both tank and
bracket
7. Complete installation with remaining clips and
fasteners.

Roth DWT Installation Manual 20 Lubricating & Hydraulic Oil Storage and Dispensing
Finished Assembly
Hose Reel
1. Bracket has two sets of pre-drilled holes for
installation on right or left side.
2. Place Hose reel assembly on bracket and align
with pre-drilled holes/slots.
3. Fasten assembly to bracket with 1/4” - 20 x 1”
hex head bolt (4) and 1/4” - 20 elastic stop nut
(4).