SeaLand HTS-Basic series (with fittings only) - Manual (Page 5)

5
Vent Line and Filter Installation
• Holding tank vent lines must be free of low points which can trap liquid and prevent
the free flow 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 filter will absorb heavier-than-air gases associated with sewage
and eliminate a source of malodor from the exterior of the boat. See vent filter
details in this manual (page 6).
When installing vent filters 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 filter below top of holding tank.
• The filter can be mounted in any position. Installations near the through-hull vent
reduce the chance of filter damage from overfilling of the holding tank.
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 filter (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).
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 flush 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 (237 ml) of SeaLand
® Holding Tank
Deodorant to the bowl. Flush the entire contents into the holding tank and continue flushing 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.
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.