Temperature and Pressure (T&P) Relief
Valve
Figure 8
Typical Temperature & Pressure Relief Valve
Installation
TEMPERATURE
AND PRESSURE
RELIEF VALVE
DISCHARGE LINE 19mm (3/4 in.)
MIN. DO NOT CAP OR PLUG.
Refer to Figure 8 for a typical T&P valve installation.
Important:
Only a new temperature and pressure relief
valve should be used with your water heater. Do not use an
old or existing valve as it may be damaged or not adequate
for the working pressure of the new water heater. Do not
place any valve between the relief valve and the tank.
The Temperature And Pressure Relief Valve:
•
Must be connected to an adequate discharge line.
• Must not be rated higher than the working pressure
shown on the data plate of the water heater.
The Discharge Line:
•
Must not be smaller than the pipe size of the relief valve
or have any reducing coupling installed in the discharge
line.
• Must not be capped, blocked, plugged or contain any
valve between the relief valve and the end of the dis-
charge line.
• Must terminate a maximum of 300mm (12 in.) max
(Canada) or 150mm (6 in.) max (U.S.A.) above a floor
drain or external to the building.
•
Must be capable of withstanding 121°C (250°F) without
distortion.
•
Must be installed to allow complete drainage of both the
valve and discharge line.
• Must not discharge so as to come in contact with any
electrical part or wiring.
WARNING
Explosion Hazard
• If the temperature and pressure relief valve
is dripping or leaking, have a licensed
plumber repair it.
• Do not plug valve.
• Do not remove valve.
• Failure to follow these instructions can
result in death or an explosion.
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