SeaLand BASIC HOLDING TANK SYSTEM User Manual

BASIC HOLDING TANK SYSTEM

OWNER'S MANUAL

For VacuFlush® and other marine sanitation systems

WARNING

!

This manual must be read and under­stood before installation, adjustment,
service, or maintenance is performed.
Modification of this product can
result in property damage.

Dometic Corporation • Sanitation Systems

13128 State Rt 226, PO Box 38

Big Prairie, OH 44611

SeaLand Product Customer Service: 1-800-321-9886

(8:00 a.m. - 5:00 p.m. ET)

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TABLE OF CONTENTS

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 5

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Winterizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Plumbing Fittings, Hose and Pipe . . . . . . . . . . . . . . . . 6

Optional HTS Components . . . . . . . . . . . . . . . . . . . . . 7

Ordering Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Manufacturer's One-Year Limited Warranty . . . . . . . . . 8

FEATURES

®

Superior Durability: SeaLand
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 fiberglass 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.

Typical
Discharge Outlet

holding tanks are molded from 100% virgin polyethylene resin. Polyethylene is best

SeaLand Diptube
Discharge Outlet

amount of residual effluent

amount of residual effluent

ISO/USCG Compliant: SeaLand Basic holding tanks 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 fitted with
a SaniGard in-line vent filter that stops unpleasant odors from escaping through the holding tank vent.

Implosion Protection: SeaLand Basic 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: Basic holding tanks are equipped
with two discharge outlets. One is for connection to a
deck-mounted discharge fitting and one is for connection
to an overboard discharge pump.

Other Components: Basic holding tanks can be easily
upgraded with other SeaLand accessories, including
discharge pumps, remote level indicator systems and
automatic discharge controls. See page 7.

Dometic Corporation reserves the right to change specifications without notice.

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INSTALLATION

CHOOSING A LOCATION FOR THE BASIC 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 filled (typical effluent weighs about 9 lbs. per 1 gallon or 1.08 Kg per
liter). Make certain to allow for total filled 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 flow of bilge
water.

Mounting surface
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 specific 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.]

BASIC HTS CONNECTIONS

Inspection port

Outlet to

through-hull

discharge fitting

Complicated plumbing layout

Simplified plumbing layout

Outlet to deck discharge fitting

Inlet from toilet

Vent line/vent filter

TankSaver
vacuum relief valve

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