Plumbing; Plumbing; Water System (Self-Contained); Water Pump And Strainer - Airstream TOMMY BAHAMA INTERSTATE 19 2024 Owner's Manual

Maintenance

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
heater's drain valve is closed and the water heater
bypass valve is in the normal use position� Close all
low point drain valves and close the fresh water tank
drain valve� For valve locations,
Locations for Winterization on page
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�
9-6
see Component
9-10�
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.

Water Pump and Strainer

The water pump and strainer are on the floor under
the curbside powered ottoman seat, underneath the
access panel on the left side of the ottoman, at the
back� To access the panel, run the ottoman out using
the ottoman switch at the side entrance�
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.
The water pump is controlled by the Multiplex control
panel� Once the switch is turned on, the pump will run
until the water pressure reaches approximately 50 psi�
At this point, an internal pressure switch will shut it off�
When a faucet is opened, the water pressure will drop
and the pump will start to run again�
As a general rule, the water pump should be turned off
while using a city water hookup; however, the water
pressure at some campgrounds may be low� The water
pump can be turned on to assist the city water hookup
pressure� Be sure there is some water in the fresh
water tank� The pump will only use the water that is
needed out of the tank to bring the pressure up to the
usual standard of 50 psi�
2024 Tommy Bahama Interstate 19
WARNING