Dometic Hts-vg, Hts-t, Hts-basic User Manual
HTS-VG, HTS-T, HTS-Basic Series Holding Tanks
Waste Holding Tank
EN
Installation manual
1
Caution!
This manual must be read and understood before installation, adjustment, service or maintenance is
performed. Modication of this product can result in property damage.
Table of Contents
HTS Benets ...................................... 2
Installation ......................................3 - 5
Cleaning .......................................... 5
Winterizing......................................... 5
HTS Components ................................... 6
Plumbing Fittings, Hose and Pipe....................... 7
Customer Service ................................... 8
Warranty .......................................... 8
HTS Benefits
Superior Durability: Dometic® 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 Dometic 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.
Typical
Discharge Outlet
amount of residual efuent
ISO/USCG Compliant: Dometic 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: Dometic tanks have extra-heavy wall thickness to prevent odor permeation. Holding tank systems can be tted
with a SaniGard™ in-line vent lter that stops unpleasant odors from escaping through the holding tank vent.
Implosion Protection: Dometic 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: Every HTS is built with high-quality Dometic sanitation system components. See page 6 for details.
Diptube
Discharge Outlet
amount of residual efuent
HTS with Vacuum Generator, Discharge Pump HTS with Basic Fittings
VENT FITTING
SEACOCK
DECK
DISCHARGE
TANK
MONITOR
HOLDING TANK SEACOCK
DISCHARGE
PUMP
VENT FILTER
HOLDING TANK
TANK
MONITOR
Dometic Corporation reser ves the right to change specifications without notice.
DECK
DISCHARGE
VENT FILTER
DISCHARGE
PUMP
2
VENT FITTING
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 efuent 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.
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 specic installations, some regulations and
standards may require the installation of a vented loop
(anti-siphon valve), one-way valve or seacock in
sewage discharge piping.]
Integrated mounting feet
in holding tank simplify
installation.
Mounting surface can be
made from plywood and
securing straps.
Complicated plumbing layout
HTS / VACUUM GENERATOR CONNECTIONS
Vent line
Outlet to
through-hull
discharge
fitting
Discharge
pump
Vent filter
Vacuum
generator
Tan k S ave r
vacuum relief
valve
Tan k
level indicators
Outlet to
dockside
discharge
fitting
Inlet from
toilet
Simplified plumbing layout
BASIC HTS CONNECTIONS
Inspection port
Outlet to
through-hull
discharge
pump
Tan k S ave r
vacuum relief valve
3
Outlet to deck
discharge fitting
Inlet from toilet or
vacuum generator
Vent line
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