Section 8, Operating the WaterHeater
International Thermal Research
8-9
REINSPECTION OF T & P RELIEF VALVES:
WARNING: Temperature and Pressure Relief Valves should be inspected AT LEAST ONCE
EVERY THREE YEARS, and replaced, if necessary, by a licensed plumbing contractor
or qualified service technician, to ensure that the product has not been affected by
corrosive water conditions and to ensure that the valve and discharge line have not
been altered or tampered with illegally. Certain naturally occurring conditions may
corrode the valve or its components over time, rendering the valve inoperative.
Such conditions can only be detected if the valve and its components are physically
removed and inspected. Do not attempt to conduct an inspection on your own.
Contact your plumbing contractor for a reinspection to assure continuing safety.
WARNING: FAILURE TO REINSPECT THIS VALVE AS DIRECTED COULD RESULT
IN UNSAFE TEMPERATURE OR PRESSURE BUILD-UP WHICH CAN RESULT IN
SERIOUS INJURY OR DEATH AND/OR SEVERE PROPERTY DAMAGE.
If discharge occurs, CALL A PLUMBER IMMEDIATELY. Discharge may indicate that an
unsafe temperature or pressure condition exists which requires immediate attention
by a qualified service technician or licensed plumbing contractor.
SEE WATER HEATER INSTRUCTION MANUAL FOR ADDITIONAL INFORMATION
REGARDING THE TEMPERATURE AND PRESSURE RELIEF VALVE.
See other side for important information
WARNING: To avoid water damage and/or scalding due to valve operation, a discharge
line must be connected to valve outlet and run to a safe place of disposal. The
discharge line shall be installed to allow complete drainage of both the valve and the
discharge line. No reducing coupling or other restriction shall be installed in the
discharge line. The discharge line must pitch downward from the valve and
terminate with a 6" (152mm) air gap from an approved location or building drain.
The discharge line must terminate through plain (unthreaded) pipe. Discharge line
material must conform to local plumbing code or A.S.M.E. requirements. Excessive
length – more than 30 feet (9.14m), use of more than four elbows or bends in
discharge piping, or reduction of discharge line size will cause a restriction and
reduce the discharge capacity of the valve. No shut-off valve should be installed
between the relief valve and tank, or in the discharge line.
To ensure proper operation, this valve must be installed by a qualified service technician
or licensed plumbing contractor in accordance with these instructions and local
plumbing codes and standards.
WARNING:
FAILURE TO COMPLY WITH THESE INSTRUCTINS REGARDING THIS VALVE CAN
RESULT IN SERIOUS PERSONAL INJURY OR DEATH AND/OR SEVER
PROPERTY DAMAGE.
Combination temperature and pressure relief valves with extension thermostats must be
installed so that the temperature-sensing element is immersed in the water in the
top 6" (152mm) of the water storage tank. They must be installed either in the hot
outlet service line or directly in a tank tapping. Valves must be located so as to
assure isolation from flue gas heat or other ambient conditions that are not indicative
of stored water temperature. See other instructions regarding the discharge line.
This device is designed for emergency safety relief and must not be used as an operating
control.
Repair or alteration of valve in any way is prohibited by national safety standards/local
codes.
