Plumbing; Lpg Regulator; Lpg Connections; Water System (Self-Contained) - Airstream Interstate 2019 Owner's Manual

Maintenance

LPG Regulator

The LPG regulators used on Airstream Touring Coach's
are designed for low-pressure service, with a normal
outlet pressure setting of 11�5-in� water column� Only
personnel trained in the proper procedures, codes,
standards, etc�, should service regulators� Have the
regulator inspected each time the tank is refilled.
Replace any regulator that has had water in the spring
case, or shows evidence of external corrosion or
corrosion inside the spring case�
CAUTION
Moisture in the LPG tank will cause a malfunction
of the regulator in controlling proper pressure.
This may result in the flame lifting off the burner or
going out frequently. Many refueling stations will
add approximately ¼ to ½ gal of alcohol allowing
moisture to pass through the regulator without the
formation of ice crystals.

LPG Connections

A quick-connect, low-pressure LPG connection is
located under the passenger side rear quarter panel
behind the dual wheels� It is a utility connection to use
for an outside grill or other LPG appliance� Check that
the remote LPG shut off switch is turned completely
off� Slide the collar on the female end back and plug
the male hose into the connection� Release the collar
and check that the hose is properly connected by
giving a firm pull on the hose. Turn the LPG remote
shut off switch on and recheck all connections to
the appliances and quick connection to be sure no
leaks are present� Follow all instructions, cautions,
and warnings in this manual when connecting and
disconnecting appliances�

Plumbing

Water System (Self-Contained)

The fresh water system consists of a city water
hookup, fresh water tank gravity fill, fresh water tank
and drain valve, water pump, hot and cold water lines,
water heater, fresh water line low point drain valves,
and faucets� Full explanations on the locations and use
of these features are explained in this section�
Before using a water system, check that the water
heater bypass valve is turned to the use position� See
Winterizing and Storage for further information on the
bypass� Check that the water heaters drain valve is
closed� Close all low point drain valves and the fresh
water tank drain valve�
9-8
Fill the water tank by opening the exterior gravity
feed water fill door. A high-pressure RV/Marine FDA
approved drinking water hose of at least ½-in� diameter
made from material that is tasteless, odorless, and
non-toxic can now be inserted, or use a clean bucket
and funnel to fill the tank. It's a good idea to let the
water run through a hose for a short time to flush it out.
RVers sometimes fill their tanks with "home" water to
avoid strange water that may be distasteful to them on
short outings� Remember, the more water you carry in
the Fresh Water tank, the less cargo carrying capacity
you have for other items� The amount of water in the
tank may be checked on the Multiplex Control Panel�
Because the water heater is tankless it does not need
to be filled. However, if the system has not been used
for some time or is being used for the first time since
draining the lines it is normal for air to have gotten into
the lines� To expel the air, open the hot side of either
the galley, wet-bath, or exterior shower faucet and turn
on the water pump or connect to an exterior city water
source� Close the cold side of all faucets� For some
time the open faucet will only sputter� This is because
the air is being pushed out through the lines� Once the
air is expelled a steady stream of water will come from
the faucet�
Now open a cold faucet� It will sputter for a short time,
but will soon expel a steady stream� All other faucets
can now be opened until all air is expelled�
Once the system is filled with water and the faucets are
closed, the water pump will shut off� When a faucet is
opened, the pump will come back on automatically� If
the faucet is just barely open, it is normal for the pump
to cycle on and off rapidly�
It is normal for a pump to occasionally cycle when all
faucets are off to keep the water pressure at the set
point� However, if it cycles frequently (e�g� more than
a few times an hour) the plumbing system, pump, and
pump strainer should be checked to be sure it is not
losing pressure through a slow water leak or back
through the pump�
NOTE
To prevent equipment damage, the water heater
should only be started after the water system is
primed and ready for use.
NOTE
Turn the water pump off when the touring coach is
left unattended.
2019 Interstate