10-11
SECTION 10
PLUMBING SYSTEMS
10 - PLUMBING SYSTEMS
NOTE:
DO NOT burst air into the system.
This can damage the water pump. It is
better to let air in slowly.
11. Let air flow for five minutes until water is
completely drained out of faucets and drain
valves. Then close faucets one at a time.
12. Operate and hold toilet flush pedal until
water is completely drained from toilet.
13. Now turn air pressure off and disconnect
water purge adapters. Recap the city water
connection to avoid contamination by dirt or
insects.
14. Close all drain valves and faucets to avoid
contamination by dirt or insects. Reinstall
water heater drain plug and close P-T relief
valve.
15. Pour about one cup of non-toxic RV anti-
freeze into the kitchen sink drain, bathroom
sink drain and shower drain. This prevents
any holding tank odors from entering the
coach during storage. It is not necessary to
add antifreeze to the toilet since the flush
valve will be closed.
16. Place a bucket beneath the sewage drain
valve outlet and re-drain the sewage and
waste holding tanks of any clean water that
entered during “blow-out” procedure.
Close dump valves to prevent valve shafts
from rusting and to prevent entry by rodents
and insects. Refit the dust cap onto the drain
outlet.
Your drainage and fresh water systems are now
totally winterized.
Do not add automotive antifreeze or caustic
chemicals such as bleach or laundry deter-
gents into the toilet bowl or holding tanks.
Although these products may have a deodor-
izing effect, they may damage plastic and
rubber parts in the system.
NOTE:
As an alternative to totally draining
the plumbing system, you may winter-
ize tanks and lines by pumping non-
toxic RV antifreeze through the sys-
tem. This product is available from
your dealer and from most RV supply
stores. Follow directions on the con-
tainer to determine the correct
amount to use for your coach.
See “RV ANTIFREEZE WATER
LINE WINTERIZATION SYSTEMS”
at the end of this section for instruc-
tions.
Winterization Valve
Your coach is equipped with a manually
operated water line winterization system for
your convenience in winterizing fresh water
lines.
The system features a diverter valve and
draw tube in-line between the tank and water
pump, and uses the water pump to draw non-
Limit air pressure to 30 psi to avoid
damage to pump or water lines.
CAUTION
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.
Leave by-pass valve handle in NOR-
MAL FLOW position if draining
water and blowing out water lines.
Place in BYPASS position ONLY
when using antifreeze solution in
water lines.
WARNING
CAUTION