7-19
SECTION 7 –
PLUMBING
Drain Water Heater
12. 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.
• Reinstall the water heater drain plug and
close the P-T Relief valve when drained.
Drain Appliances
13. At this time, if your coach is equipped with an
optional refrigerator ice maker or washer/
dryer, the waterlines for these appliances must
also be drained. (See “Winterizing Optional
Appliances” instructions at the end of this
section.)
If not equipped with optional appliances,
proceed to the next numbered step.
Fill Drainage System P-Traps
14. Pour about one cup of RV antifreeze down
each drain for the galley sink, lavatory sink,
and shower/tub. This fills the drain trap pipes
to prevent holding tank odors from entering
the coach during storage.
Dump and Clean Holding Tanks
15. Completely drain the sewage and waste water
holding tanks at an approved waste disposal
site. Drain the sewage tank first so the
following waste water can rinse any waste
solids from the sewage drain outlet and hose.
16. Flush the sewage tank using the Black Waste
Tank Flush Inlet.
17. Close waste tank drain valves and refit the
dust cap onto the sewage drain outlet.
This will inhibit rust formation on valve shafts
and prevent entry and contamination by
airborne debris, insects, and rodents.
Your drainage and fresh water systems are
now winterized.
See instructions for removal from storage in
Section 11 - Maintenance and Storage.
WINTERIZING OPTIONAL
APPLIANCES
Winterizing Ice Maker
Norcold
®
Refrigerator
1. Drain coach waterlines.
2. Unscrew the water supply line from the
bottom of the water inlet valve and drain any
water left in the line. This connection is
located in the refrigerator service access
compartment on the outside of the coach (see
“Refrigerator Service Access Compartment”
in
Section 4 - Appliances and Systems
).
Water Heater Drain Plug
(Remove with socket)
Pressure Temperature Relief Valve
(Lift handle only when water heater is cold)
