SECTION 7 –
PLUMBING
7-10
12. Turn air pressure off and disconnect water
purge adapters. Recap the city water
connection to avoid contamination by dirt or
insects.
After Disconnecting Air Pressure
13. Close all waterline and tank drain valves and
all faucets to avoid contamination by dirt,
insects, or rodents.
14. Reinstall the water heater drain plug and close
the P-T Relief Valve.
15. 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.
NOTE: It is not necessary to add antifreeze to
the toilet since the flush valve will be
closed.
Do not add automotive antifreeze or
caustic chemicals such as bleach or
laundry detergents into the toilet bowl or
holding tanks. Although these products
may have a deodorizing effect, they may
damage plastic and rubber parts in the
system.
16. Empty the water pump strainer filter bowl to
avoid water freezing and cracking the filter
bowl. See “Water Pump” previously in this
section.
Dump and Clean Holding Tanks
17. Completely drain the sewage and waste water
holding tanks (black and gray) 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.
18. Flush the sewage tank using the Black Waste
Tank Flush Inlet (if equipped).
19. Close dump 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
totally winterized.
See instructions for removal from storage in
Maintenance Section.
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.
The system features a winterization (diverter)
valve with an antifreeze siphon tube to draw non-
toxic RV water system antifreeze into the
waterlines. There is also a water heater bypass
valve to avoid filling the water heater with
antifreeze. See Water System Drain Valve
Location chart at the end of this section for the
location on your model.
Leave bypass valve handle in NORMAL
FLOW position if draining water and blowing
out waterlines. Place in BYPASS position ONLY
when using antifreeze in waterlines.
Remove Water Filters (if equipped)
1. Before pumping RV antifreeze into water
system, remove filter cartridge from the filter
assembly below the galley sink (if equipped
with refrigerator with ice maker).
WARNING
Never use automotive antifreeze/coolant
in your RV water system. Auto antifreeze
contains ethylene glycol which, if
ingested, can cause blindness and can
be fatal.
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