Winnebago Sunstar - Winterizing Procedure

SECTION 7 -
PLUMBING
7-8
WINTERIZING PROCEDURE
Method 1 - Blow Out Procedure
1. Level the motor home and drain the entire
plumbing system as described in the
following steps.
2. Open waterline drain valves and drain fresh
water tank. (See Water System Drain Valve
Locations chart at the end of this section for
locations of drain valves on your model.)
3. Open the Exterior Wash Station shower knobs
(if equipped) and lay shower head on ground
to drain any water left in the shower line. Also
place the tip of your finger into the city water
inlet and gently press the backflow valve
“button” in the center of the inlet to drain any
water trapped in the inlet line.
4. Turn on water pump and open all sink faucets
and shower head knobs. Leave open after
water stops flowing.
5. Press the toilet flush pedal and hold until
water stops flowing in the toilet. Then turn
water pump switch off.
6. At this time, if your coach is equipped with an
optional refrigerator ice maker, dishwasher or
washer/dryer, the waterlines for these
appliances must also be drained. Instructions
are included at the end of this section. If not,
proceed to the next step.
7. 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.
8. 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.
CAUTION
Leave bypass valve handle in NORMAL
FLOW position if draining water and
blowing out water lines. Place in BYPASS
position ONLY when using antifreeze
solution in water lines.
Water Heater Drain Plug
Remove with socket
Lift handle only when water heater is cold
City Water
Connection
Fresh Water
Inlet
Blow-out
Plug
Air Hose