User manual
4
KEY SYSTEM COMPONENTS
Vacuum Toilet: The VacuFlush toilet operates in a way different from other marine toilets. VacuFlush systems use
a small amount of water (a little more than a pint or .5 liter) per ush in addition to a simple vacuum. The toilet is
connected to a pressurized freshwater system. Fresh water is the key to an odor-free bathroom compartment.
VacuFlush toilets are equipped with an integral vacuum breaker which prevents the possible contamination of the
potable water supply.
Vacuum Tank: The vacuum tank stores vacuum energy. System vacuum level is monitored by a vacuum switch
located on the vacuum tank. When this switch senses a drop in vacuum in the system, it automatically signals the
pump to energize and bring the vacuum to operating level. This process is normally completed in less than one min-
ute. In a properly operating system, the stored vacuum will slowly dissipate between ushes, permitting the vacuum
pump to quickly renew the vacuum.
Vacuum Pump: The vacuum pump is an electric, straight-through bellows type. It is manufactured of long-lasting
polypropylene and draws only 4 to 6 amps of current at 12 VDC. This unique pump design is both an efcient air and
liquid pump that handles solids without a problem. It has two duckbill valves on each side of the pump chamber to
prevent backow of waste and vacuum.
Vacuum Generator: The vacuum generator combines the vacuum tank and vacuum pump in one unit.
It greatly reduces installation time and eliminates the hose run between the tank and pump. Its compact size makes
it especially well-suited to smaller crafts.
Holding Tanks: Holding tanks from Dometic are made of super-strong, 3/8" (9.5mm) thick polyethylene — 50% thicker
than most other holding tanks. Each unit has a solid, one-piece construction with no seams for unmatched durability.
Tanks come in several capacities and shapes. Contact Dometic for details. A deodorant additive is required to keep
the holding tank odor-free. See Deodorants and Special Tissue section for further information.
TankWatch
®
Level Indicator: The TankWatch unit utilizes micro-oat switches which activate an indicator panel. The
inspection cap in the holding tank contains the micro-oat switch units. The adjustable probe assemblies are exible
polybutylene tubing and are designed to ex when tank contents move.
In-Line Vent Filter: Our SaniGard
TM
vent lter has special odor-removing lter materials to help keep your boat smelling
clean and pleasant. Heavier-than-air malodors accumulate in the holding tank. The SaniGard vent lter has a special
type of activated lter media to remove these odors before they offend. Each cartridge is good for an entire season,
and is easily replaced for a fresh start. Replacement cartridges are available from your local marine dealer.
Dockside Discharge Deck Fitting: The holding tank is connected to a deck discharge tting. This tting, in turn,
can be connected to a dockside pump which may have a rubber, cone-shaped nozzle or a cam lock tting. Refer
to Accessories section for further information on the NozAll™ tting which makes using a dockside pump easy and
convenient.
Discharge Pump: Our T-series SaniPump
TM
discharge pump can run dry without harm and draws just 6 amps at 12
VDC. The discharge pump has a ow rate of just over 5.25 gallons per minute (11.4 liters per minute). Emptying an
onboard tank usually takes four to six minutes. The T-pump is connected to a through-hull tting. Check the section
on Marine Sanitation Regulations for information on areas where discharge is allowed.