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Temperature-Pressure Relief Valve
WARNING
At the time of manufacture this water heater was provided
with a combination temperature-pressure relief 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 ANS1 Z21.22 and the code
requirements of ASME If replaced, the valve must meet the
requirements of local codes, but not less than a combination
temperature and pressure relief valve certified as meeting
the requirements for Relief Valves and Automatic Gas
Shutoff Devices for Hot Water SupplySystems, ANSI Z21.22
by a nationally recognized testinglaboratory that maintains
periodic inspection of production of listed equipment or
materials°
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 a discharge 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 me use
of a temperature-pressure relief valve complying with ANSI
Z21.22 and ASME, may require a valve model dl_fferent from
the one furnished with the water heater,
ampliance with such local requirements must be satisfied
the installer or end user of the water heater with a locally
'escribed temperature-pressure relief valve installed in the
tesignated opening in the water heater in place of the facto-
'y furnished valve.
:or safe operation of the water heater, the relief valve must
not be removed from it's designated opening or plug.ged.
The temperature-pressure relief valve must be Installed
directly into the fittingof the water heater designated for the
relief valve. Position the valve downward and provide tubing
so thal 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. Excessive length, over 30 feet, or use of 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 Injury, 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, t_hewater flow
may cause property damage .........
The Discharge Pipe:
--Must not Gesmaller in size than the outlet pipe size of the
valve, or have any reducing couplings or other restriction.
--Must not be pluggedor 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
plpe.
_Must terminate at an adequate drain.
--Musl not have any valve between the relief valve and tank°
WARNING
The temperature-pressure relief valve must be manual-
ly operated at least once a year, Caution should be
taken to ensure that (I) no one is in front of or around
the outlet of the temperature-pressure relief valve dis-
charge line, and (2) t_e 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 complete-
ly reset and continues to release water, immediately
close the cold water inlet to the water heater, follow the
draining instructions, and replace the temperature-pres-
sure relief valve with a new one°
HOT
SHUTOFF COLD
VALVE
[]
RE-PRESSURE
RELIEF VALVE
HARGE PIPE
(Do not cap or plug)
6" AIR GAP
FLOOR DRAIN
RELIEF VALVE OPENING
ATTHETIMEOF MANUFACTURE,THISWATERHEATERWASPROVIDED
WITHACOMBINATIONTEMPERATURE-PRESSUREREUE_:VALVELISTED
ASCOMPLYINGWITHTHESTANDARDFORRELIEFVALVESANDAUTO-
MATICGASSHUTOFFDEVICESFORHOTWATERSUPPLYSYSTEMS,
ANSIZ2122. FORSAFEOPERATIONOF THEWATERHEATER,THE
RELIEFVALVEMUSTNOTBEREMOVEDFROMITSDESIGNATEDPOINT
OF INSTALLATIONORPLUGGED
YOURLOCALJURISDICTIONALAUTHORITY,WHILEMANDATINGTHEUSE
OFATEMPERATURE,PRESSURERELIEFVALVECOMPLYINGWITHANS!
Z21.22ANDASME,MAYREQUIREA VALVEMODELDIFFERENTFROM
THEONEFURNISHEDWITHTHEWATERHEATER
COMPLIANCEWITHSUCHLOCALREQUIREMENTSMUSTBESATISFIED
BYTHEINSTALLERORENDUSEROF THEWATERHEATERWITHA
LOCALLYPRESCRIBEDTEMPERATURE-PRESSURERELIEFVALVE
INSTALLEDINTHEDESIGNATEDOPENINGINTHEWATERHEATER,
SEEMANUALHEADING--"TEMPERATURE,PRESSURERELIEFVALVES"
FORINSTALLATIONANDMAINTENANCEOFRELIEFVALVE,DISCHARGE
PIPEANDOTHERSAFETYPRECAUTIONS
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