Dometic 4809 Installationi ST T - GeneralgE E Informationi M T cont’d, Discharge Piping Layouts

Installationi ST T – GeneralgE E Informationi M T (cont’d)

Discharge Piping Layouts

VacuFlush toilets must be connected to 1.5-inch (38mm) ID flexible sanitation hose. Connections can be made either through the floor or out the rear of the toilet above the floor.

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.

Flush

Switch

				Problem
					Hose		Discharge
							Pump
			Wye
			Valve
Vacuum
Toilet
	Vacuum							Problem
						Holding Tank		Hoses
	Generator
		Flush
									Seacock
		Switch
					Problem Hose
					must use rigid
					PVC pipe or
					OdorSafe Plus
					hose

Vacuum

Toilet

Vacuum

GeneratorDischarge

Pump

Holding Tank

Seacock

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 fitting manufacturer’s recommendation for further information.

Vented loop must be at least 8 inches [203mm] above water line during all conditions of heel, trim or load.

Water Line

Flush

Switch

Vacuum

Toilet

Vacuum
Generator	Seacock