Johnson Hardware IB-412 R01 Marine Sanitation System User Manual


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10
Alternative 2:
Toilet above the waterline
You may use a 19 mm. (3/4”) non-return valve
• Run the inlet hose by the most direct route from the inlet seacock
totheushingpumpinlettail
• For your maximum convenience of use, install an in-line non-
return valve next to the inlet seacock which will ensure that the
pump stays primed in between usages.
• Thetoiletushingpumpwillself-primeupto1m(3’)abovethe
outsidewaterlevel.Ifthereisanypossibilitythatthetoiletushing
pump inlet may be more that 1m (3’) above the actual waterline
when the craft is underway, a non-return valve is to be installed
next to the seacock to maintain the pump in a primed condition
Pipework – Outlet, 4 alternatives
Alternative 1:
Toilet below the waterline and discharging overboard
Fig. 1
Toilet below the waterline
Youmustusea38mm(11/2”)VentedLooptting.
• Arrange the outlet hose, so that its highest point is at least 20 cm
(8”)abovethewaterline,andttheVentedLoopatthehighest
point.
Alternative 2:
Toilet above the waterline and discharging overboard
Fig. 2
Toilet above the waterline
Youmayusea38mm(11/2”)VentedLooptting.
• Run the outlet hose up from the discharge elbow, at least 30 cm
(12’)abovethedischargeelbowthentaVentedLoopontopof
the hose, ensuring in this way to keep some water in the base of
the toilet without risk of it being siphoned away
Alternative 3:
Toilet waste discharging into holding tank, discharge
elbow below top of holding tank at any time
Youmustusea38mm(11/2”)VentedLooptting
• If the discharge elbow is placed less than 20 cm (8”) below the
top of the holding tank when the craft is at rest, or if there is any
possibility that the discharge elbow may be below the top of the
tankatanytime,aventedloopmustbettedintheoutletpipe-
work
• Place the outlet hose point at least 20cm (8”) above the highest
level that the top of the tank may reach and install the Vented Loop
ttingonthishighestpoint
Alternative 4:
Toilet waste discharging into holding tank, discharge
elbow always above top of the holding tank
Youmayusea38mm(11/2”)VentedLooptting
• Run the inlet hose upwards from the discharge elbow, to form a
loop at least 30 cm (12”) higher than the discharge elbow.
• ByttingaVentedLoopontopofthehoseloop,youwillensure
to keep some water in the base of the toilet without risk of it being
siphoned away.
5. TESTING:
Refer to the operating instructions and follow the procedures for
normal use.
Incasetheushingpumpishardtoprime,half-llthebowlwithfresh
water
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