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SECTION 7 -
PLUMBING
4. Drain Toilet. Press the toilet flush lever and
hold until water stops flowing in the toilet.
Turn Water Pump switch OFF.
5. Drain Water Heater. Turn OFF the Water
Heater Power switch before draining the
water heater tank to avoid damage to the
heating element. Drain the water heater by
removing the plug from the base of the water
heater tank, accessible from the outside of the
motorhome (requires socket and ratchet).
Water Heater Drain Plug
(Remove with socket)
-Typical View
CAUTION
Hot water can escape from tank causing
injury. Operate relief valve or remove
drain plug only when the tank water is
cold.
• Also, open the Pressure-Temperature Relief
valve at the top right portion of the tank to
prevent air locking in the tank while
draining.
7-12
Pressure-Temperature Relief Valve
(Lift handle only when water heater is cold)
-Typical View
6. Connect Air Pressure. After water has
stopped draining at all faucets and drain
valves, leave faucets open and connect a
"blow-out" plug to the city water connection
on the motorhome. Then use a compressed air
hose regulated to 30 psi or less to force air
through the system. A blow-out plug can be
purchased at any Winnebago Industries
dealer.
City Water
Connection
Blow-out
Fresh Water
Inlet
NOTICE
Limit air pressure to 30 psi to avoid
damage to equipment.
NOTE: DO NOT burst air into the system. This
can damage the water pump. It is better
to let air in slowly.
7. Let air flow for five minutes until water is
completely drained out of faucets and drain
valves, then close faucets one at a time.
®
Air Hose
Plug
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