7-9
SECTION 7 -
PLUMBING
3.
Open Faucets.
Turn on the water pump and
open all sink faucets and shower head knobs.
Leave open after water stops flowing.
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
coach (requires socket and ratchet).
•
Also, open the Pressure-Temperature Relief
valve at the top right portion of the tank to
prevent air locking in the tank while draining.
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 coach. 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
®
or Itasca
®
dealer.
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.
8.
Drain Toilet.
Operate and hold toilet flush
lever until water is completely drained from
toilet.
CAUTION
Hot water can escape from tank causing
injury. Operate relief valve or remove
drain plug only when the tank water is
cold.
Water Heater Drain Plug
(Remove with socket)
-Typical View
NOTICE
Limit air pressure to 30 psi to avoid
damage to equipment.
Pressure-Temperature Relief Valve
(Lift handle only when water heater is cold)
-Typical View
City Water
Connection
Fresh Water
Inlet
Blow-out
Plug
Air Hose
