SECTION 7 -
PLUMBING
7-12
5. Press the toilet flush pedal and hold until
water stops flowing in the toilet. Then turn
water pump switch off.
6. 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.
7. 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.
8. Let air flow for five minutes until water is
completely drained out of faucets and drain
valves. Then close faucets one at a time.
9. Operate and hold toilet flush lever until water
is completely drained from toilet.
10. Turn air pressure off and disconnect water
purge adapters. Recap the city water
connection to avoid contamination by dirt or
insects.
Method 2 – Antifreeze Fill
Procedure
(Fill plumbing lines with RV water system
antifreeze)
NOTE: As an alternative to totally draining the
plumbing system, you may winterize
tanks and lines by pumping non-toxic RV
antifreeze through the system. This
product is available from your dealer
and from most RV supply stores. Follow
directions on the container to determine
the correct amount to use for your coach.
Your coach is equipped with a manually
operated waterline winterization system for your
convenience in winterizing fresh waterlines.
Water Heater Drain Plug
(Remove with socket)
Pressure Temperature Relief Valve
(Lift handle only when water heater is cold)
NOTICE
Limit air pressure to 30 psi to avoid
damage to equipment.
City Water
Connection
Fresh Water
Inlet
Blow-out
Plug
Air Hose
