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Pleasenotethefollowing:
DONOTinstallthiswaterheaterwithironpiping.
Thesystemshouldbeinstalledonlywithnewpiping
thatissuitableforpotable(drinkable)watersuchas
copper,CPVC,orpolybutylene.DONOTusePVC
waterpiping.
DONOTuseanypumps,valves,orfittingsthatare
notcompatiblewithpotablewater.
DONOTusevalvesthatmaycauseexcessive
restrictiontowaterflow.Usefullflowballorgate
valvesonly.
DONOTuse50/50tin-leadsolder(oranylead
basedsolder)inpotablewaterlines.Use95/5tin-
antimonyorotherequivalentmaterial.
DONOTtamperwiththegasvalve/thermostat,
igniter,thermocouple,ortemperatureandpressure
reliefvalve.Tamperingvoidsallwarranties.Only
qualifiedtechniciansshouldservicethese
components.
DONOTusewithpipingthathasbeentreatedwith
chromates,boilerseal,orotherchemicals.
DONOTaddanychemicalstothesystempiping
whichwillcontaminatethepotablewatersupply.
Closed System/Thermal Expansion
Periodic discharge of the temperature and pressure
relief valve may be due to thermal expansion in a
closed water supply system. The water utility supply
meter may contain a check valve, backflow preventer or
water pressure reducing valve. This will create a closed
water system. During the heating cycle of the water
heater, the water expands causing pressure inside the
water heater to increase. This may cause the
temperature and pressure relief valve to discharge
small quantities of hot water. To prevent this from
happening, there are two recommendations:
1. Install a diaphragm-type expansion tank that is
suitable for potable water on the cold water supply
line. The expansion tank must have a minimum
capacity of 1.5 U.S. gallons for every 50 gallons of
stored water.
.
Install a 125 PSI pressure relief valve in the cold
water supply line. Make sure the discharge of this
valve is directed to an open drain and protected
from freezing. Contact the local water supplier or
plumbing inspector for information on how to
control this situation. Do not plug the temperature
and pressure relief valve.
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