7-11
SECTION 7 -
PLUMBING
Drain Water Heater
11. Turn off the Water Heater power switch
before draining the water heater tank to avoid
damage to the heating element.
12. 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.)
13. Open the Pressure-Temperature Relief Valve
at the top right portion of the tank to prevent
air locking in the tank while draining.
14. Reinstall the water heater drain plug and close
the P-T relief valve when drained.
Drain Appliances
15. 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. (See
“Winterizing Optional Appliances”
instructions at the end of this section.)
If not equipped with optional appliances,
proceed to the next step.
Close All Drain Valves
16. Close all waterline drains and tank drain
valves to avoid contamination by dirt, insects,
or rodents.
17. 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
18. 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 dump outlet and sewer hose.
19. Flush the sewage tank using the Black Waste
Tank Flush Inlet (if equipped).
20. Close dump valves and refit the dust cap onto
the 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
totally winterized.
See instructions for removal from storage in
Maintenance Section.
WINTERIZING OPTIONAL
APPLIANCES
–If Equipped
Winterizing Ice Maker
When winterizing, make sure the waterline is
completely drained by following this procedure.
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
compartment on the outside of the coach. (See
Refrigerator Service Access Compartment in
Appliances & Systems section.)
Water Heater Drain Plug
(Remove with socket)
Pressure Temperature Relief Valve
(Lift handle only when water heater is cold)
