Temperature-Pressure Relief Valve WARNING
At the time of manufacture this water heater was provided
with a combination temperature-pressuresrelief valve certi-
fied by a nationally recognized testing laboratory that main-
tains periodic inspection of production of listed equipment
or materials, as meeting the requirements for Relief Valves
and Automatic Gas Shutoff Devices for Hot Water Supply
Systems,and the latest edition of ANSI Z21.22 and the code
requirements of ASME. If replaced, the valve must meet the
requirements of local codes, but not lessthan a combination
temperature and pressurerelief valve certified asmeeting the
requirements for Relief Valves and Automatic Gas Shutoff
Devices for Hot Water Supply Systems,ANSI Z21.22 by a
nationally recognized testing laboratory that maintains peri-
odic inspectionof production of listed equipment or materi-
The valve must be marked with a maximum set pressure not
to exceed the marked hydrostatic working pressure of the
water heater (150 Ibs./sq. in.) and adischarge capacity not
less than the water heater input rate as shown on the model
rating plate. (Electric heaters - watts divided by 1000 x 3415
equal BTU/Hr. rate.)
Your local jurisdictional authority, while mandating the use
of a temperature-pressure relief valve complying with ANSI
Z21.22 and ASME, may require a valve model different from
the one furnished with the water heater.
Compliance with such local requirements must be satisfied
by the installer or end userof the water heater with alocally
prescribed temperature-pressure relief valve installed in the
designated opening in the water heater in place of the facto-
ry furnished valve.
For safe operation of the water heater, the relief valve must
not be removedfrom it's designatedopening or plugged.
The temperature-pressure relief valve must be installed
directly into the fittingof the water heater designatedfor the
relief valve. Position the valve downward and provide tubing
so that any discharge will exit only within 6 inches above, or
at any distance below the structural floor. Be certain that no
contact is made with any live electrical part. The discharge
opening must not be blocked or reduced in size under any
circumstances.Excessivelength, over 30 feet, or useof more
than four elbows can cause restriction and reduce the dis-
charge capacity of the valve.
No valve or other obstruction is to be placed between the
relief valve and the tank. Do not connect tubing directly to
discharge drain unless a 6" air gap is provided. To prevent
bodily J_njury,hazard to life, or property damage, the relief
valve must be allowed to discharge water in quantities
should circumstances demand. If the discharge pipe is not
connected to a drain or other suitable means, the water flow
may cause property damage.
The Discharge Pipe:
--Must not I_e smaller in size than the outlet pipe size of the
valve, or have any reducing couplingsor other restriction.
--Must not be plugged or blocked.
--Must be of material listed for hot water distribution.
--Must be installed so as to allow complete drainage of both
the temperature-pressure relief valve, and the discharge
--Must terminate at an adequate drain.
--Must not have any valve between the relief valve and tank.
The temperature-pressure relief valve must be manual-
ly operated at least once a year. Caution should be
taken to ensure that (1) no one is in front of or around
the outlet of the temperature-pressure relief valve dis-
charge line, and (2) the water manually discharged will
not cause any bodily injury or property damage
because the water may be extremely hot.
If after manually operating the valve, it fails to com-
pletely rest and continues to release water, immediate-
ly, close the cold water inlet to the water heater, follow
the draining instructions, and replace the temperature-
pressure relief valve with a new one.
:_ TEMPERATU RE-
I--- DISCHARGE PIPE
(Do not cap or plug)
6" AIR GAP
WARNING "RELIEF VALVE OPENING"
This water heater is provided with a combinaUon Temperature-Pressure Relief Valve _istedas coml_ymg with
the standard for Relief Valves and Automatfu Gas Shutoff Devices for Hot Water Supply Systems, ANSZ21.22
and the code requirements of ASME.
YourtocaHudsdi_onalauthedty,whitemandahngthe useof a Temperature-PressureReliefValvecomplying
with ANS Z21,22 and ASME, may require a valve model different from the one furnished w_ththe water heater
Compliance _th such local requirements must be satisfied by the installer or end user o[ the water heater with
a locally prescribed Temperature-Pressure Relief Valve installed in the designated opening in the water
TANKI_' ; :' _ ,, t:, I JACKET
TANK _..,_'/1-_,_ '_',1 BRASS
T&P BELIEF .... _ II_'--Y'_D_/'_
VALVEPROBE_qllll al I I II m_'TEMPERATURE-
MUSTEXTEND'----'----'TllH, ,---11_111II, t_Jtim '_PRESSURE
•If a short shank (less than 2") temperature-pressure relief valve is to be instalted
(as shown), a nipple and coupling must be used.
• I1 a long shank (2" or longer) is to be installed, do not use the nipple and coupling.
"Install Temperatsre-Presoure protechve equipment required by local codes, but not less than a combina-
tion Temperature-Pressure Relief Valve certified as meeting the requirements for Reliel Valves and
Automatic Gas Shutoff Devices for Hot-Water Supply Systems, ANS Z2122 by a nationally recognized leaf
ing taberatory that maintains periedto inspection of production of listed equipment or matenals The valve
must be oriented, provided with tubing, or othe_ise installed so that discharge can exit only within 6 inches
above, or at any distance below the structural floor, and cannot contact any live electhcal pad '
For safe operation of the water heater, the Relief Valve must not be removed or plugged
See manual heading - "Temperature-Pressure Relief Valve" for inslallation and maintenance e_ Reliet
Valve, discharge pipe and other safety precautions.