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Dometic Gravity-Flush Toilet Winterization and storage
4. Press ush pedal and allow water to completely drain from water valve and vacuum breaker.
5. Leave water line disconnected until threat of freezing temperature is past.
Note
Never leave vehicle or premises unoccupied for extended periods of time with municipal
water supply or onboard water pump turned on when there is a possibility of freezing
temperature.
IMPORTANT:
Toilet warranty does not cover freeze-damaged water valve
The Dometic 310 and 320 series toilet warranty expressly excludes coverage for any damages to
the toilet or vehicle that may occur as a result of improper winterization of the toilet. An indicator of
improper winterization is freeze damage to the water valve which results in leaks.
Dometic 310 and 320 series toilet water valves
exceed maximum water pressure as dened by
North American plumbing code agencies. However,
if trapped water freezes in piping that supplies water
to the toilet, it expands and creates extremely high
pressure that can damage the valve (see photo).
To avoid this, winterize the toilet as described in
this manual. If freeze-damage occurs as a result of
improper winterization, replace the water valve with
a 300/310/320 toilet water valve kit, part number
385311641. IF WATER VALVE IS RETURNED FOR
WARRANTY CLAIM, DOMETIC RESERVES THE
RIGHT TO DENY CLAIM IF PROBLEM IS CAUSED
BY FREEZE DAMAGE.
Fig.
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A – Freeze Damage Indicator Window: white stress marks indicate freeze damage
B – Water valve damage due to severe exposure to below-freezing temperature
A
B
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