Instructions For Winterization; Optional-Additional Steps For Winterization - Airstream INTERSTATE 24 2024 Owner's Manual

Water heater bypass valve - on the water line
connected to the water heater; behind the service
panel under the roadside rear lounge�
Water pump - under the galley (remove the lower
drawer), or, depending on your model, it may be below
the refrigerator (remove the vent below the refrigerator)
Water Management Panel - roadside exterior access
door�

Instructions for 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�
4� OPEN the fresh water tank drain valve�
5� OPEN the water heater drain valve�
6� Allow all water to stop draining and proceed to the
next step�
7� SET the selector on the Water Management Panel
to CITY FIXTURES�
8� For this step, you will need someone to operate
the toilet foot pedal/flush valve. Using the air
compressor, apply at MAX 30 PSI of air pressure
at the Water Management Panel 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�
Use the City Fixtures setting for compressed air
winterization. Do NOT exceed MAX 30 PSI when
using compressed air to clear the system of water
during winterization.
NOTE
The MAX 30 PSI can be increased to a MAX 50 PSI
if the water heater bypass valve has been set to its
bypass position. CAUTION - if 30 PSI is exceeded
with the bypass valve in the normal use position,
the water heater could be damaged.
NOTE
The valve is regulated to 50 PSI. The 100 PSI MAX
label on the panel only refers to the inlet valve's
max pressure.
2024 Interstate 24
WARNING
9� 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�
10� Check the water pump strainer to be sure no water
remains�
11� If you plan to add RV antifreeze using the optional
steps below, RECONNECT the water pump�
Otherwise, leave the fittings from the pump
disconnected until the system is ready to be used
again� Best practice: leave a note as a reminder
near the Monitor Panel that the water pump is
disconnected�
12� If you plan to add RV antifreeze using the optional
procedure below, save this step for the end�
Otherwise, for best practice: REMOVE the house
batteries from your touring coach and store them
in a cool, dry place where there is no danger
of freezing� During extended storage periods,
especially in cold weather conditions, check the
batteries periodically and keep them fully charged
for optimal life� If the storage period is 30 days or
less, you can turn off the battery disconnect switch
rather than remove the batteries�

Optional-Additional Steps for Winterization

An additional step to winterization is to consider adding
a non-toxic RV antifreeze (approved for drinking water
systems) to the water lines using the Sanitize/Winterize
setting on the Water Management Panel to draw RV
antifreeze from an unpressurized container into the
water system, using the water pump�
To perform these steps, you will need RV antifreeze
and a 1/2 inch diameter tasteless, odorless, non-toxic,
hose with a standard garden hose thread designed for
RV use�
Before beginning, read the RV antifreeze
manufacturer's label for instructions specific to the
antifreeze you plan to use� It may take a few gallons
to fill the entire system so prepare accordingly. As you
follow these steps, it will be helpful to have another
person watching and operating the faucets, shower
heads and toilet valve�
1� RECONNECT all lines and CLOSE all drain valves�
2� OPEN the sink and shower drains if they are
closed�
3� Ensure all the water faucets and shower heads, hot
and cold, internal and external, are OPEN�
Maintenance
9-15