Winterization Procedure - Airstream INTERSTATE SE 2024 Owner's Manual

Winterization Procedure

To perform these steps, you will need an adapter with
an air regulator to connect an air compressor to the city
water inlet, and access to an air compressor� Adapters
are available at most RV stores�
For the location of components mentioned throughout
this procedure, see Component Locations for
Winterization on page 9-12�
1� Level the touring coach from side to side and from
front to rear�
2� Turn the water pump OFF and disconnect the city
water�
3� OPEN all the water faucets and shower heads, hot
and cold, internal and external�
4� OPEN the low-point drain valves and water heater
drain valve� REMOVE the fresh water tank plug�
Allow the system time to drain completely�
5� Turn both of the water heater bypass valves from
the normal use position a quarter-turn to the
bypass position;
see Water Heater Winterizing on
page 9-15.
NOTICE
The furnace/water heater manufacturer does
not recommend blowing air through the water
heater or adding antifreeze to the water heater.
Air pressure and antifreeze will cause damage to
internal components. Refer to the manufacturer's
user manual for additional winterization
instructions.
6� For this step, you will need someone to operate
the toilet foot pedal/flush valve. Using the air
compressor, apply at MAX 50 lbs� of air pressure
at the city water inlet until no water remains in the
system� Operate the foot pedal on the toilet� You
may need to depress the pedal a few times to work
out all the water by allowing some air pressure to
build up between flushing. Once all the water has
been blown from the system, disconnect the air
and continue to the next step�
7� For this step, have a catch pan or a towel ready
to place under the water pump outlet to prevent
water from running out into the touring coach�
Remove the quick-connect outlet fitting from the
water pump. Turn the pump ON briefly to remove
any remaining water from the pump head and lines
running from the tank�
2024 Interstate 19 SE
WARNING
The water pump is mounted near wiring and
electrical components. Exercise caution to avoid
electric shock or inadvertently disconnecting
touring coach wiring when accessing the pump.
Turn off all power using the battery disconnect
and ensure all circuits in the vicinity of the pump
are de-energized before accessing the pump.
8� Check the water pump strainer to be sure no water
remains�
9� Leave drains open and fittings from the pump
disconnected until the system is ready to be used
again� Best practice: leave a note as a reminder
near the multiplex panel to close drain valves,
return the bypass valves to normal use position,
reconnect the water pump, and reinstall the fresh
tank drain plug�
NOTICE
Do not overtighten the fresh water tank drain
plug. Overtightening may strip the threads on the
tank, plug, or both.
10� Fully charge the batteries before storage and turn
off the battery disconnect switch� If the coach is
stored indoors for long periods without charging,
the batteries will eventually deplete to a zero state
of charge, causing a low-voltage disconnect;
Low-Voltage Disconnect on page
extended storage periods, especially in cold
weather conditions, it is recommended to check the
house and chassis batteries periodically and keep
them fully charged for optimal life�
Maintenance
see
5-12� During
9-13