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Temperature-PressureRelief Valve
WARNING
At the time of manufacture this water heater was provided
with a combination temperature-pressures 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 eoidon of ANSI Z21.22 and the code
requtrements of ASME. If replaced, the valve must meet the
requirementsof local codes, but not lessthan 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 testing laborato_ that maintains
periodic inspection of production of listed equipment or
materials.
The valve must be marked with a maximum set pressurenot
to exceed the marked hydrostatic working pressure of the
water heater (150 Ibs./sq. in.) and a discharge cai_city not
lessthan the water heater input rate as shown on the model
rating plate. (Electric heaters - watts divided by 1000 x 3415
equa| BTU/Hr. rate.)
Your local jurisdictional authority, while mandating the use
of a temperature-pressure relief valve complyingwith ANSI
Z21.22 and ASME, may require a valve moc'leld_erent 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 a locally
prescribed temperature-pressure relief valve installed in the
€leslgnated 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 removed from it's designated opening or plugged.
The temperature-pressure relief valve must be installed
directly into the fittin_of the water heater designated for the
relief valve. Positiont_e valve downward and provide tubing
sothat any dischargewill 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 15 feet_ or use of more
than two elbows can cause restriction and reduce the
dischargecapacity 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 oroperty damage, the relief
valve must be allowed to discharge water in quantities
should circumstances demand. If the discharge pnpe is not
connected to a drain or other suitable means, t-hewater flow
may causeproperty damage.
The Discharlze Pipe: . _
'--Must not Ee smaller in size than the outlet pipe size of the
valve, or have any reducing couplingsor other restriction.
---Must not be plumedor blocked.
_ust be of mate_]'al listedfor hot water distribution.
_ust be installed so asto allow complete drainage of both
the temperature-pressure relief valve, and the discharge
". . ..
._-_!! tner_nl_;va_eaatyana_vd;bqe_edr_e relief valve and tank.
11
WARNING
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 dischargedwill
not cause any bodily injury or property damage
becausethe water may beextremely hot.
If after manually operating the valve, it fails to com-
pletely reset and continues to release water, immedi-
ately closethe cold water inlet to the water heater, fol-
low the draining instructions, and replace the tempera-
ture-pressurerelief valve with a new one.
..,_q
HOT
SHUTOFF COLD
VALVE
JRE-PRESSURE
RELIEFVALVE
[]
(Do not cap or plug)
6" AIR GAP
FLOOR DRAIN
RELIEF VALVE OPENING
ATTHETIMEOFMANUFACTURE,THISWATERHEATERWASPROVIDED
WITHACOMBINATIONTEMPERATURE-PRESSURERELIEFVALVELISTED
ASCOMPLYINGWITHTHESTANDARDFORRELIEFVALVESANDAUTO-
MATICGASSHUTOFFDEVICESFORHOTWATERSUPPLYSYSTEMS,
ANSIZ21.22.FOR SAFEOPERATIONOFTHE WATERHEATER,THE
RELIEFVALVEMUSTNOTBEREMOVEDFROMITSDESIGNATEDPOINT
OFINSTALLATIONORPLUGGED.
YOURLOCALJURISDICTIONALAUTHORITY,WHILEMANDATINGTHEUSE
OFA TEMPERATURE-PRESSURERELIEFVALVECOMPLYINGWITHANSI
Z21.22ANDASME,MAYREQUIREA VALVEMODELDIFFERENTFROM
THEONEFURNISHEDWITHTHEWATERHEATER.
COMPLIANCEWITHSUCHLOCALREQUIREMENTSMUSTBESATISFIED
BYTHEINSTALLERORENDUSEROF THEWATERHEATERWITHA
LOCALLYPRESCRIBEDTEMPERATURE-PRESSURERELIEFVALVE
INSTALLEDINTHEDESIGNATEDOPENINGINTHEWATERHEATER.
SEEMANUALHEADING--"TEMPERATURE-PRESSURERELIEFVALVES"
FORINSTALLATIONANDMAINTENANCEOF RELIEFVALVE,DISCHARGE
LINEANDOTHERSAFETYPRECAUTIONS.