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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.
• 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).
Water Heater Drain Plug
(Remove with socket)
• Also open the Pressure-Temperature Relief
Valve at the top right portion of the tank to
prevent air locking in the tank while
draining.
Pressure-Temperature Relief Valve
(Lift handle only when water heater is cold)
• Reinstall the water heater drain plug and
close the P-T Relief Valve when drained.
Close All Drain Valves
12. Close all waterline drains and tank drain
valves to avoid contamination by dirt, insects,
or rodents.
7-16
13. 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
14. 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.
15. 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.
To Winterize the Waste Pump
•
Make sure that black and gray holding tanks
are completely empty.
•
Pour 2 gallons of RV antifreeze down the
shower OR galley sink drain.
16. Press and Hold the Waste Pump switch for
about 5-10 seconds to get antifreeze into the
pump.
Your drainage and fresh water systems are now
completely winterized. See instructions for
removal from storage in Section 11 -
Maintenance and Storage.
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