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) per flush 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 minute. In a properly operating system, the stored vacuum will leak down between flushes, causing the
vacuum pump to run for a short period.
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
efficient air and liquid pump and handles solids without a problem. It has two duckbill valves on each side of the
pump chamber.
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 SeaLand 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 and no leaks. Tanks come in several capacities and shapes. Refer to page 18 for holding
tank specifications. 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-float switches which activates a three-
light panel. The inspection cap in the holding tank contains the micro-float switch units. The adjustable probe
assemblies are flexible polybutylene tubing and are designed to flex when tank contents move. One adjustable
probe in the three-light system is set to sense when tank is empty.