Plumbing; Lpg Regulator; Lpg Connections; Water System (Self-Contained) - Airstream Interstate Nineteen 2020 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 the water system, check that the water
heaters drain valve is closed� See Winterizing and
Storage for further information on the drain valve�
Close all low point drain valves and the fresh water
tank drain valve�
9-8
Fill the water tank by opening the main sliding door to
access the gravity feed water fill cap. 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�
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� Keep watch
of the water level as the water fill is essentially on the
interior of the unit�
Open the hot side of the galley faucet and turn on the
water pump switch located on the monitor panel� For
some time, the open faucet may only sputter� This is
because the water heater is being filled and air is being
pushed out through the lines� Once the water heater is
full, a steady stream of water will flow from the faucet.
Now, open a cold faucet� It may 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 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 or in motion.
2020 Interstate Nineteen