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Discharge Piping Layouts
VacuFlush toilets must be connected to 1.5-inch (38mm) ID exible sanitation hose. Connections can be made
either through the oor or out the rear of the toilet above the oor.
Flexible hoses that contain sewage from any marine toilet will create unpleasant odor that permeates through the
wall of the hose. Avoid this condition by installing the tank in the lowest position in the boat so that hose contents
will drain into the holding tank. Rigid PVC pipe can also be installed in runs that hold trapped sewage. The marine
sanitation hose most resistant to odor permeation is OdorSafe Plus
®
hose, available from your local SeaLand or
VacuFlush product dealer.
INSTALLATION – GENERAL INFORMATIONINSTALLATION – GENERAL INFORMATION (cont’d)
Vented Loops
Ventilated or vented loops are intended to prevent back siphonage of sea water into the toilet. If the toilet rim is
below the waterline at ANY time in ANY conditions of heel, load or trim, a vented loop MUST be installed in the
hose run at a point at least 8-in. (203 mm) above the toilet water line in all such conditions. See vented loop tting
manufacturer’s recommendation for further information.
Flush
Switch
Vacuum
Toilet
Wye
Valve
Problem
Hose
Holding Tank
Discharge
Pump
Problem
Hoses
Seacock
Seacock
Discharge
Pump
Problem Hose
must use rigid
PVC pipe or
OdorSafe Plus
hose
Holding Tank
Vacuum
Generator
Vacuum
Toilet
Flush
Switch
Vacuum
Generator
Vacuum
Toilet
Seacock
Flush
Switch
Vented loop must be at least 8 inches
[203mm] above water line during all
conditions of heel, trim or load.
Water Line
Heeled Water Line
Vacuum
Generator