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Drain Valve
The potable water line drain valve is located behind the axle between the wheel (left side) and
the chassis (or near the dump valves on some models) (photo E-2).
Emptying Potable Water Tank
Pumping the water out with the self-contained water pump may empty the potable water tank.
Simply turn on the pump switch and open a couple of faucets until the water will no longer come
out. On all models there is also a drain valve behind the axle between the wheel (left side) and
the chassis (or near the dump valves on some models) (photo E-2).
IMPORTANT: To prevent damage to the tank, turn off the water pump as soon as the tank
is empty.
NOTE: For winterizing purposes, only the petcock behind (or before) axle needs to be open to
drain the tank.
Safety
If your water system is full and cold and the water heater is ignited, the system can see pressures
as high as 120 psi (827 kPa) before the relief valve starts to open. Since the water system normally
operates in the 40 psi (275 kPa) range, the expanding water does put unusual stress on the
system. This normally does not cause any problems, but the stress may be easily alleviated. As
the water is heating, simply open any faucet and release as little as one cup of water. Just
removing this small amount of water significantly reduces the pressure build-up.
PHOTO E-2
Drain valve
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