Dometic GROUP SeaLand VacuFlush HTS-VG User manual

1
This manual must be read and under-
stood before installation, adjustment,
service, or maintenance is performed.
Modication of this product can
result in property damage.
WARNING
!
VacuFlush®HTS-VG Models (with vacuum generators)
Standard HTS-T Models (with discharge pump only)
Basic HTS Models (with ttings only)
SeaLand®
HOLDING TANK SYSTEM
OWNER’S MANUAL
Dometic Corporation, Sanitation Division
13128 State Rt 226, PO Box 38
Big Prairie, OH 44611
SeaLand Product Customer Service: 1-800-321-9886
www.Dometic.com

2
Dometic Corporation reserves the right to change specications without notice.
HTS BENEFITS
TABLE OF CONTENTS
SeaLand HTS Benets ......................... 2
Installation ................................3-5
Cleaning .................................... 5
Winterizing................................... 5
HTSComponents............................. 6
Plumbing Fittings, Hose and Pipe ................. 7
Ordering Parts ................................ 8
CustomerService............................. 8
Manufacturer's One-Year Limited Warranty. . . . . . . . . . 8
Superior Durability: SeaLand®holding tank systems (HTS) are molded from linear low density polyethylene (LLDP)
resin. Polyethylene is best-suited for holding tank construction because of its resistance to corrosion and odor permeation,
and it will last longer than the life of a typical berglass hull.
Leak-Proof Design: All hose connections in SeaLand holding tanks are on the top of the tank, eliminating possibility of
leakage due to a faulty connection below the liquid level of the tank contents. Our unique diptube design reduces the risk
of plugging while keeping the residual contents in the tank to a minimum.
ISO/USCG Compliant: SeaLand HTS models are fully compliant with the ISO 8099:2000(E) standard and applicable
requirements of the United States Coast Guard for pleasure craft installation.
Odor-Free Design: SeaLand tanks have extra-heavy wall thickness to prevent odor permeation. Tanks can be tted with
a SaniGard™ in-line vent lter that stops unpleasant odors from escaping through the holding tank vent.
Implosion Protection: SeaLand holding tanks are equipped with a TankSaver™ vacuum relief valve which prevents
damage from dockside pumps that operate at very high levels of vacuum. The TankSaver valve opens automatically under
vacuum conditions, but remains sealed regardless of shock-loading or vibration.
Multiple Tank Outlets: Most HTS models are equipped with two discharge outlets. One is for connection to a deck-
mounted discharge tting and one is for connection to an overboard discharge pump.
HTS Components: Your HTS is built with high-quality SeaLand sanitation system components. See page 6 for details.
SeaLand Diptube
Discharge Outlet
Typical
Discharge Outlet
amount of residual efuent amount of residual efuent
HTS with Vacuum Generator, Discharge Pump HTS with Basic Fittings

3
INSTALLATION
CHOOSING A LOCATION FOR THE HTS
As a general rule, the HTS should be positioned as low in the hull as possible with all interconnecting hoses or pipes
sloped to permit gravity drainage and prevent potential hose odor permeation.
The holding tank must not be exposed to temperatures above 120°F (45°C). Do not place near heat sources such as
engine manifolds, water heaters, generators, etc.
Be certain to estimate holding tank weight when lled (typical efuent weighs about 9 lbs. per 1 gallon or 1.08 Kg per
liter). Make certain to allow for total lled weight when selecting materials for mounting the tank. Also consider impact of
full tank on vessel trim.
PREPARING A MOUNTING SURFACE
1. Mount tank to surface that supports the entire area of
the tank.
2. If required, fabricate mounting surface and toe blocks
from 13 mm or 19 mm (1/2-inch or 3/4-inch) plywood.
3. Do not mount tank on projections such as screw or bolt
heads, which could puncture the tank.
4. Do not allow holding tank to block free ow of bilge
water.
Mounting surface can be
made from plywood and
securing straps.
AVOIDING HOSE ODOR PERMEATION
• Hose failure due to odor permeation almost
always occurs in hose runs which retain
sewage when the system is not in use.
• Eliminate all unnecessary runs which retain
trapped liquids, if possible.
• Where possible, use rigid PVC pipe in sections
that cannot be arranged to drain.
• Simplify hose layout by removing unnecessary
valves. [For specic installations, some regula-
tions and standards may require the installation
of a vented loop (anti-siphon valve), one-way
valve or seacock in sewage discharge piping.]
Simplied plumbing layout
BASIC HTS CONNECTIONS
TankSaver
vacuum relief valve
Vent line
Inlet from toilet or
vacuum generator
Outlet to deck
discharge tting
Inspection port
Outlet to
through-hull
discharge
pump
Integrated mounting
feet in holding tank
simplify installation.
HTS / VACUUM GENERATOR CONNECTIONS
Vent line
Outlet to
through-hull
discharge
tting
Inlet from
toilet
TankWatch
level indicators
TankSaver
vacuum relief
valve
SaniGard
vent lter
Vacuum
generator
SaniPump
discharge
pump
Outlet to
dockside
discharge
tting
Complicated plumbing layout

4
INSTALLATION (cont’d)
PLUMBING CONNECTIONS AND HOSE LAYOUTS
When connecting exible hose to plastic ttings, use liquid dish soap on end of tting and inside hose
end to make connection easier.
Do not use any other lubricants, sealants or adhesives when connecting sanitation hoses and ttings.
Do not restrict the ability to pull the hose or pipe.
EXCELLENT
Avoid binding corners and sharp bends.
Do not use wire ties to secure the hose
or pipe.
Support exible hose every 12 inches
(.3 m), and support rigid pipe every 5 feet
(1.5 m).
When creating new holes, avoid
reinforcement stringers and tabs.
YES YES
Trough sup-
port
SOLVENT BONDING FOR RIGID PIPE AND FITTINGS
1. Use PVC cleaner on both
bonding surfaces.
2. Use PVC cement (must
contain tetrahydrofuran) on
both bonding surfaces.
3. Connect parts using a twist
and hold motion until the
cement is set.
4. Let the joint cure for at least
four hours or according to
instructions on PVC cement
container. (Cold temperatures
require longer cure times.)
1
2
3
Position clamp screws 180° apart from
each other and tighten clamps.
CLAMP CONNECTIONS FOR FLEXIBLE HOSE AND
FITTINGS
Dometic recommends that each hose connection be
secured with two hose clamps to prevent any leaks.
STRINGER
TABS
AVOID
AVOID
YES

5
SERVICE ACCESS
Because SeaLand holding tanks may require minimal service in normal operation, the tank must be installed so that there
is easy access to the tank inspection port, discharge pump and vent lter (if installed).
An in-line maintenance valve must be installed in any piping runs which retain liquid and are connected to components that
may require periodic servicing (such as discharge pumps).
VENT LINE AND FILTER INSTALLATION
• Holding tank vent lines must be free of low points which can trap liquid
and prevent the free ow of gases from or air into the holding tanks.
• Do not use non-reinforced hose for vent lines. Over time, it will tend to
kink and effectively block the vent.
• A holding tank vent lter will absorb heavier-than-air gases associated
with sewage and eliminate a source of malodor from the exterior of the
boat. See vent lter details in this guide (page 6).
When installing vent lters that are not mounted directly on an HTS unit:
• Avoid areas near excessive heat sources such as engine manifolds or
lights.
• Do not install the lter below top of holding tank.
• The lter can be mounted in any position. Installations near the
through-hull vent reduce the chance of lter damage from overlling of
the holding tank.
INSTALLATION (cont’d)
WINTERIZING
If using the HTS with SeaLand’s VacuFlush components, refer to VacuFlush toilet owner’s manual for winterization
instructions. If using antifreeze to winterize the HTS, use only propylene glycol freshwater antifreeze that does not contain
alcohol. Antifreeze that contains alcohol will result in damage to your sanitation system.
1. Pump out holding tank.
2. Thoroughly ush the system with fresh water before adding propylene glycol freshwater antifreeze to the HTS.
CLEANING
A small amount of water remains in all marine holding tanks. It is good practice to rinse the tank after the contents have
been discharged. This can be accomplished by adding water to the toilet bowl. Add 8 ounces (237ml) of SeaLand®
Holding Tank Deodorant and Cleaner to the bowl. Flush the entire contents into the holding tank and continue ushing
until the discharge from the holding tank is clear.
Do not use chlorine-based cleaners, caustic cleaners or chemicals, such as drain-opening products, as they may damage
the system’s seals and hose.

6
SaniGard™ Holding Tank Vent Filter*
With odor-removing lter media, the vent lter stops odors from
escaping the holding tank vent. Keeps boats smelling clean
and pleasant. Each
cartridge is good for
an entire season and
is easily replaced.
Plumbing Connection Dimensions
Inlet Fitting Size: 1-1/2 inch 38.1 mm
Outlet Fitting Size: 1-1/2 inch 38.1 mm
Vent Inlet/Outlet Size: 5/8 inch 15.9 mm
Electrical Requirements 12 VDC 24 VDC
Vacuum Generator: 10 amp 5 amp
Level Indicator: 3 amp 3 amp
Discharge Pump: 10 amp 5 amp
†
†
† Requires separate circuit breaker.
HTS COMPONENTS
VacuFlush®Vacuum Generators*
On HTS-VG models, VacuFlush vacuum generators combine
the vacuum tank and vacuum pump in one unit. All models
eliminate hose runs between the vacuum tank and pump that are
found in previous VacuFlush systems. HTS vacuum generators
feature Q-series vacuum pumps, offering quieter performance
and faster vacuum generation than previous models.
OTHER HTS FEATURES
OdorSafe®Plus Sanitation Hose
OdorSafe Plus hose provides the best odor barrier of any
marine hose available.
It delivers up to 19 times
greater resistance to
sulfurous malodors
than other “no-odor”
marine hoses. On HTS
models, it's used for all
1 1/2-inch (38mm) hose
connections. It's also
best for connecting the
discharge pump to the
through-hull and deck
waste ttings.
Diptube Discharge
Our diptube discharge design allows for
removal of waste from the top of the hold-
ing tank rather than near the bottom of
the tank. This feature greatly reduces the
opportunities for stagnant sewage to sit in
tank discharge lines – a main cause of odor
permeation and hose failure.
PLUMBING, ELECTRICAL SPECIFICATIONS
Dometic, OdorSafe, SeaLand, TankWatch and VacuFlush are registered trade-
marks of Dometic Corporation.
SaniGard, SaniPump and TankSaver are trademarks of Dometic Corporation.
TankSaver™ Vacuum Relief Valve
Prevents damage due to tank implosion from
dockside pumps that generate very high
vacuum. TankSaver valve opens automatically
under vacuum, but remains sealed regardless
of shock-loading or vibrations.
TankWatch®4 Level Monitor and Micro-Float
Switches*
Includes four tank
levels – Empty, Low, Mid
and Full. Micro-float
switches are installed in
holding tank. No electri-
cal components contact
waste or water. Operates
on 12 or 24-volt DC.
Uses only .017 amps
at 13-volts. Micro-float
switches are installed
either as a unit (with a
TankWatch cap) or as
separate indicators.
SaniPump™ Overboard
Discharge Pump*
Runs dry without harm. Draws
6 amps at 12 VDC. Delivers
flow rate of 3.9 gallons per
minute (14.7 liters per minute).
Connects to through-hull tting.
Check Marine Sanitation Regu-
lations for information on areas
where discharge is allowed.
* Not available on all HTS models.
VacuFlush Shut-
down Relay*
To prevent overlling a
holding tank, a shutdown
relay is supplied with
HTS-VG models. When
the tank reaches "Full",
the relay shuts off the
vacuum generator, preventing further ushing of the toilet.
Separate
Float Switches
Combined
Float Switches

7
PLUMBING FITTINGS, HOSE AND PIPE
SeaLand® valves and ttings are designed for use with 1-1/2" (38mm) ID OdorSafe®Plus sanitation hose and
1-1/2" (38mm) ID PVC pipe.
HOSE BALL VALVE
Part No. DescriPtioN
307346087 Ball Valve Non-corrosive PVC with Teon®seals.
HOSE FITTINGS
Part No. DescriPtioN
307230310 Hose Mender Kit Connects 1½" (38mm) for maintenance purposes.
307230311 90º Bend Kit Provides smooth sweep bend. Eliminates hose kinking in sharp bends.
307230312 Hose Adapter Kit Connects 1½" (38mm) hose to 1½" (38mm) NPT thread.
307230313 Double Bend Kit Connects intersecting 1½” (38mm) hose segments per indicated ow.
307238798 Wye Kit Connects intersecting 1½" (38mm) hose segments per indicated ow.
307238802 Tee Kit Connects intersecting 1½" (38mm) hose segments per indicated ow.
307341113 Reducing Adapter Connects 1½” (38mm) hose to 1" (25mm) hose.
307341513 Custom Hose Adapter Can be used with all 1½" (38mm) PVC ttings with socket
connection. Lubricated hose or cuff slides on easily.
307348684 Flexible Vinyl Couplings 3" (76mm) length of soft vinyl to couple 1 ½" (38mm) hose
adapter ttings.
307238803 Hose Tail Piece Connects hose to 1½" (38mm) MPT with swivel nut and sealing ring
included.
PIPE FITTINGS
Part No. DescriPtioN
307341085 Pipe Coupling Connects 1½" (38mm) PVC pipe sections.
307341143 90º Bend 90º Ell for connecting 1½" (38mm) PVC pipe sections.
307341425 Threaded Male Adapter Adapts 1½" (38mm) PVC pipe to 1½" (38mm) NPT thread.
307347286 45º Wye Makes three way connection to 1½" (38mm) PVC pipe.
307341812 Double Bend Makes three way connection of 1½" (38mm) PVC pipe.
307341158 Sanitary Tee Makes three way connection of 1½" (38mm) PVC pipe.
307342971 Special Adapter for Toilet Outlet Adapts VacuFlush toilet outlet to other PVC pipe
connections.
307341104 PVC 45°Street Ell For custom tting design. Adapts to all 1½" (38mm) PVC ttings shown
here.
307341161 PVC 90°Street Ell For tight bends. Can be used with other PVC ttings shown.
1½" (38mm) Hub.
PLUMBING PIPE AND HOSE
Part No. DescriPtioN
307001540 PVC Rigid Pipe 1½" (38mm) ID x 5-ft. (1.5m) length.
307342871 OdorSafe®Plus Sanitation Hose 1½" (38mm) ID x 50-ft. (15.2m) roll.
307345650 Vent Hose 5/8" (16mm) ID x 50-ft. (15.2m) roll. Use for holding tank vent line.
Connects to SaniGard vent lter.
307346087
307230310 307230311
307230312 307230313
307238803
307348684
307341113 307341513
307238802307238798
307341143
307341085
307341425
307347286
307341812
307341158
307342971
307341104
307341161
307001540
307342871

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Dometic warrants, to the original purchaser only, that this product, if used for personal, family or household purposes, is free from
defects in material and workmanship for a period of one (1) year from the date of purchase.
If this Dometic product is placed in commercial or business use, it will be warranted, to the original purchaser only, to be free of
defects in material and workmanship for a period of ninety (90) days from the date of purchase.
Dometic reserves the right to replace or repair any part of this product that proves, upon inspection by Dometic, to be defective
in material or workmanship. All labor and transportation costs or charges incidental to warranty service are to be borne by the
purchaser-user.
EXCLUSIONS
IN NO EVENT SHALL DOMETIC BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, FOR DAMAGES RESULT-
ING FROM IMPROPER INSTALLATION, OR FOR DAMAGES CAUSED BY NEGLECT, ABUSE, ALTERATION OR USE OF
UNAUTHORIZED COMPONENTS. ALL IMPLIED WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANT-
ABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE, ARE LIMITED TO A PERIOD OF ONE YEAR FROM THE DATE
OF PURCHASE.
IMPLIED WARRANTIES
No person is authorized to change, add to, or create any warranty or obligation other than that set forth herein.
Implied warranties, including those of merchantability and tness for a particular purpose, are limited to one (1) year from the
date of purchase for products used for personal, family or household purposes, and ninety (90) days from the date of purchase
for products placed in commercial or business use.
OTHER RIGHTS
Some states do not allow limitations on the duration of an implied warranty and some states do not allow exclusions or limitations
regarding incidental or consequential damages; so, the above limitations may not apply to you. This warranty gives you specic
legal rights, and you may have other rights which vary from state to state.
To obtain warranty service, rst contact your local dealer from whom you purchased this product.
MANUFACTURER'S ONE-YEAR WARRANTY
ORDERING PARTS
Dometic is ready to assist you in the event service is required. Before calling, please have the following information available.
Your cooperation in having this information ready is appreciated and allows us to better meet your needs.
1. HTS Model Number (see Parts List on separate sheet)
2. Serial Number (see label located on HTS tank)
3. Part Number, Description and Quantity (see Parts List)
CUSTOMER SERVICE
There is a strong, worldwide network to assist in servicing and maintaining your sanitation system. For the
Authorized Service Center near you, please call from 8:00 a.m. to 5:00 p.m. (ET) Monday through Friday.
Telephone: [phone] U.S.A. and Canada
330-496-3211 International
Email: [email protected]
® Registered; ™ Trademark of Dometic Corporation
© Dometic Corporation
600343562 01/10
Dometic Group is a customer-driven, world-leading provider of
leisure products for the RV, automotive, truck and marine markets.
We supply the industry and aftermarket with a complete range of air
conditioners, refrigerators, awnings, cookers, sanitation systems,
lighting, mobile power equipment, comfort and safety solutions,
windows, doors and other equipment that make life more comfortable
away from home.
Dometic Group supplies a wide range of workshop equipment for
service and maintenance of built-in air conditioners. Dometic Group
also provides specially designed refrigerators for hotel rooms, ofces,
wine storage and transport and storage of medical products.
Our products are sold in almost 100 countries and are produced
mainly in wholly-owned production facilities around the world.
Dometic Corporation, Sanitation Division
13128 State Rt 226, PO Box 38
Big Prairie, OH 44611
SeaLand Product Customer Service: 1-800-321-9886
www.Dometic.com