Rheem 300 series - Manual (Page 8)

8
REGULAR CARE
TEMPERATURE PRESSURE RELIEF VALVE
This valve is near the top of the water
heater and is essential for its safe
operation. It is possible for the valve to
release a little water through the drain
line during each heating period. This
occurs as the water is heated and
expands by approximately 1/50 of its
volume.
Continuous leakage of water from the
valve and its drain line may indicate a
problem with the water heater (refer to
“Temperature Pressure Relief Valve
Running”
on page 11).
WARNING: Never block the outlet of
this valve or its drain line for any
reason.
Operate the easing lever on the
temperature pressure relief valve once
every six months. It is very important
you raise and lower the lever gently.
DANGER: Failure to do this may result
in the water heater cylinder failing.
If water does not flow freely from the
drain line when the lever is lifted, then
the water heater should be checked by
the Rheem Service Department or their
Accredited Service Agent.
The temperature pressure relief valve should be checked for performance or
replaced at intervals not exceeding 5 years, or more frequently in areas where
there is a high incidence of water deposits (refer to
“Water Supplies” on
page 30).
water
heater
drain
line
lift until water
flows from the
drain line –
lower gently