Airstream Excella 1975 Owner's Manual page 72

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the main frame rail. The main holding tank
dump valve is located to the rear of the
sewage outlet and the auxiliary holding tank
dump valve is located forward of the sewage
outlet (see photo). On Land Yacht models the
main holding tank dump valve is located in
the rear bumper storage compartment (see
photo), and the auxiliary holding tank dump
valve is located next to the sewage outlet on
the roadside main frame rail just forward of
the bumper (see photo).
To empty one or both tanks attach the sewer
hose by pressing the bayonnet fitting onto the
dump valve outlet and rotate clockwise until
it feels solid and secure. Attach the outlet end
of the hose to the sewage outlet, making sure
that the hose is placed so that it will drain
completely. The dump valves have two wire
loops that lock the handle in the closed
position. To unlock push outward on the wire
loops and they will snap loose, permitting you
to open the valve. Pull up the dump valve
handle as far as it will go and wait until the
tank is drained. When dumping, the main
holding tank should be dumped first; then the
auxiliary holding tank. This will help to rinse
out the sewer line with auxiliary holding tank
water.
The main holding tank must be flushed out
until all paper and waste material is removed.
Close the dump valve and refill the tank with
5 to 10 gallons of clean water and repeat until
clean.
On International rear bath models, a con¬
venient fitting for flushing the holding tank is
in the center of the rear trunk compartment.
Land Yacht Dump Valve
-
Main Holding Tank
Land Yacht Dump Valve - Auxiliary Holding Tank
Replace the plug after using the fitting. The
sewer hose is stored in the rear bumper
compartment. Rinse out the sewer line before
storing.
When in a park and connected to a sewer
Land Yacht Sewage Outlet
Portable Auxiliary Holding Tank
outlet, keep the main holding tank dump
valve closed and empty the tank every few
days or whenever it becomes almost full. Only
by sending a large volume of liquid through
the main holding tank at a time will toilet
paper and other solids completely wash away.
64

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