2
To break the siphon, air must be let into the top of
the loop of pipe, allowing water to drop back on
both sides of the loop, and stopping it from flowing
into the hull.
A Vented Loop (C) is fitted with a one-way valve at
the top, permitting water to be pumped through the
loop and out of the hull, but preventing the
formation of a siphon that would allow water to flow
back into the hull.
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WASTE DISCHARGE from
TOILETS (all models) or
HOLDING TANKS
IN UNRESTRICTED
WATERS ONLY
WATERLINE
VENTED LOOP
ONE-WAY
VALVE
AT LEAST 200 mm
(8") ABOVE STATIC
AND HEELED
WATERLINES
WATERLINE
VENTED
LOOP
HEELED
STATIC
DISCHARGE
SEACOCK
PUMPED WASTE FROM
TOILET OR WASTE
HOLDING TANK
