SECTION 7 –
PLUMBING
7-18
After Disconnecting Air Pressure
16. Close all waterline and tank drain valves, and
all faucets to avoid contamination by dirt,
insects, or rodents.
Leave the Water Heater Drain (Yellow) Valve
open until the winterization process is
complete or the system is placed back into
service.
17. Remove the Cold Water Filter Canister under
the galley sink. Reinstall after emptying the
canister.
Dump and Clean Holding Tanks
18. Completely drain the waste water holding
tanks at an approved waste disposal site.
Drain the sewage (black) tank first so the
following waste water can rinse any waste
solids from the dump outlet and sewage drain
hose.
19. Attach a garden hose from a city water
hydrant to the Black Waste Tank Flush Inlet
fitting. (This inlet is clearly marked separate
from the City Water inlet).
20. Turn the water on to begin flushing. Allow
water to run for about three minutes.
21. Disconnect garden hose from flushing
system, allow water to drain from port, then
replace cap.
22. Close waste tank drain 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.
23. Continue with Step 2 - Antifreeze Fill
Procedure.
Step 2 – Antifreeze Fill Procedure
(Fill plumbing lines with RV water system
antifreeze)
NOTE: Non-Toxic RV water system antifreeze is
available from your dealer and from
most RV supply stores and national retail
outlets.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.
24. Turn Winterization Valve 1 (Water Heater
Bypass valve) in BYPASS position.
WARNING
NEVER use automotive antifreeze/
coolant in your RV water system.
Automotive coolant/antifreeze contains
ethylene glycol which, if ingested, can
cause blindness and can be fatal.
