Touring Coach Winterization; Water Heater Winterizing - Airstream TOMMY BAHAMA 2020 Owner's Manual

Maintenance

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� 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 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 fittings with regulators
can be purchased for the city water inlet� Be sure
the toilet flush 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 open position� If
more than 30 lbs of pressure is used on the water
heater damage could occur�
7� Water pump: Remove quick-connect outlet fitting
from the pump and turn the pump on briefly 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 fittings 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�
9-14
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 fills 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 fixtures 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
fitting, and reconnect water system inlet line.

Water Heater Winterizing

If the touring coach is to be stored during winter
months, the water heater system must be drained to
prevent damage from freezing� Once drained RV non-
toxic antifreeze can be added�
1� Turn off electrical power to water heater�
2� Shut off gas supply to water heater�
3� Turn off water pump on water system�
2020 Tommy Bahama TC