Maintenance
9-14 2020 Interstate
Touring Coach Winterization
1� Level the touring coach from side to side and front
to rear, turn the water pump off, and disconnect the
city water�
2� Open all the hot and cold water faucets�
3� Open the low point drain valves for the hot
and cold water lines, the fresh water tank drain
valve, and water heater drain� There are four
fresh water line low point drain valves� Two are
located, depending on the model, under the galley
accessed by removing the drawer below the
microwave or below the refrigerator accessed by
removing the vent below the refrigerator� Two are
located under the curbside lounge accessed by
removing the cup holders� In the twin bed model
two are located under the curbside bed accessed
by lifting the mattress� The fresh water tank drain
plug is located on the front of the tank under the
touring coach� The water heater drain valve is
located on the water heater under the roadside
rear lounge or bed accessed by removing the
service panel�
4� Follow the winterizing instructions for your toilet in
this manual�
5� While the water is draining from the systems
remove, drain, and store the wet bath and the
exterior shower hoses and shower heads�
6� After the water has stopped running, apply at most
30 lb of air pressure at the city water inlet� This
can be accomplished at a service station if no air
compressor is available. Air ttings with regulators
can be purchased for the city water inlet� Be sure
the toilet ush valve, toilet shut off valve, all drain
valves, and all faucets are open and the pump
outlet hose is disconnected� 50 lb of air pressure
can be accomplished only if the water heater
bypass valve has been set to its bypass position� If
more than 30 lbs of pressure is used on the water
heater damage could occur�
7� Water pump: Remove quick-connect outlet tting
from the pump and turn the pump on briey to
pump out any remaining water from the pump head
and lines from the tank� Check the water pump
strainer to be sure no water remains� There should
be very little water if the tank is drained� Be sure
to have a catch pan or a rag under the pump to
prevent water from spilling into the touring coach�
Leave the ttings disconnected from the pump until
the system is ready to be used again� Leave a note
on the water pump switch that the plumbing is not
connected�
8� Remove the house batteries from your touring
coach and store in a cool dry place where there
is no danger of freezing� It is very important for
optimum life of your battery to check it periodically
and to keep it fully charged� This is especially
true in winter months, when the temperature may
drop below freezing� If the period of storage is
for 30 days or less, you may turn off the battery
disconnect switch rather than remove the battery�
Continue to check and recharge the battery as
needed, at least weekly in severe weather�
An Optional, but not necessary, method for winterizing
protection, is to add a non-toxic antifreeze (approved
for drinking water system) to the water lines using the
following procedure:
1� Reconnect all lines except the one to the pump
inlet port and close all drain valves�
2� Attach a length of hose to the water pump inlet
port� This piece of hose should be long enough
for the free end to be inserted into and reach the
bottom of a RV, non-toxic antifreeze container�
3� Check that all interior water faucets are still open�
4� Insert hose length into container containing, RV,
non-toxic antifreeze, turn the pump on, and run
the water pump until the RV, non-toxic antifreeze
solution lls all water lines. Flush toilet.
5� Open exterior shower faucet until RV, non-toxic
antifreeze comes out of the hose, shut off the
valve, and remove the drain valve/hose assembly�
6� Close water xtures as the RV, non-toxic antifreeze
begins to come out� Shut off the pump when
RV, non-toxic antifreeze has been distributed
throughout the system, and then reopen all faucets
to relieve pump pressure�
7� Disconnect the hose length from the pump inlet
tting, and reconnect water system inlet line.
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