7-13
SECTION 7 -
PLUMBING
8.
Drain Toilet.
Operate and hold toilet flush
lever until water is completely drained from
toilet.
9.
Turn air pressure off
. Disconnect water
purge adapters. Recap the city water inlet to
avoid contamination by dirt or insects.
After Disconnecting Air Pressure
10. Close all waterline drains, tank drain valves,
and all faucets excluding the manifold hot and
cold low point drains. Due to the fact these are
the lowest points in the system, they must
remain open to allow migrated water to drain
out of the system until the system is ready to
be placed in use.
11. Reinstall the water heater drain plug and close
the Pressure-Temperature Relief valve.
12. 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 motorhome 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.
13. 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
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.
Your drainage and fresh water systems are now
winterized.
See instructions for removal from storage in
Section 11 - Maintenance and Storage.
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 motorhome.
Your motorhome 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 the “Water System Drain Valve
Locations” chart at the end of this section for
location on your model.
Leave the Water Heater Bypass valve handle
in NORMAL FLOW position if draining water
and blowing out waterlines. Place in BYPASS
position ONLY when using antifreeze in
waterlines.
