SECTION 6
APPLIANCES & EQUIPMENT
6-12
The water heater tank is designed so that there
is normally an air pocket at the top of the tank that
acts as a pressure buffer. In time, however, heat-
ed water may expand and fill this air pocket,
causing a slight increase in water pressure. This
may cause the P-T valve to “weep” until the air
pocket is manually replaced.
To Replace the Air Pocket:
1. Turn off the water heater switch and incom-
ing water supply (city water and/or demand
pump).
2. Open a faucet in the motor home to relieve
water pressure.
3. Pull the handle of the P-T valve straight out
and allow water to flow until it stops.
4. Let the handle of the P-T valve snap shut.
5. Close the faucet and turn on the water supply
before switching the water heater on.
Manually operate the pressure temperature re-
lief valve at least once a year.
*If your water heater is equipped with the
optional Motor Aid system, it uses an extension
from the engine cooling system to heat water in
the water heater while driving. The engine cool-
ing system must also be cold before opening the
pressure-temperature relief valve. See “Motor
Aid” for more information.
Water Heater By-Pass Valve
Your coach is equipped with a water heater
by-pass valve for easier winterization of water
lines using RV antifreeze. The valve is located in
the passenger side front compartment.
OPERATE THIS VALVE ONLY
WHEN THE WATER HEATER
AND COOLING SYSTEM* ARE
COLD!
Water Heater Service Access Panel
Water Heater - Exterior Service View
P-T Valve
(Lift Straight Out Slowly -
Let Snap Back)
CAUTION
Open
Lift handle straight out to open P-T valve.
