Relief Valve - Whirlpool Gas Water Heater High Efficiency Atmospheric Vent Installation Instructions And Use & Care Manual

Temperature and Pressure

Relief Valve

WARNING
Explosion Hazard
If the temperature and pressure relief valve
is dripping or leaking, have a qualified
person replace it.
Examples of a qualified person include:
licensed plumbers, authorized gas company
personnel, and authorized service
personnel.
Do not plug valve.
Do not remove valve.
Failure to follow these instructions can
result in death, or explosion.
Figure 15A
Temperature and Pressure
Relief Valve Installation
For protection against excessive pressures and
temperatures, a temperature and pressure relief valve must
be installed in the opening marked "T & P RELIEF VALVE"
(see Figure 15A). This valve must be design certified by
a nationally recognized testing laboratory that maintains
periodic inspection of the production of listed equipment or
materials as meeting the requirements for Relief Valves and
Automatic Shut-off Devices for Hot Water Supply Systems,
ANSI Z21.22. The function of the temperature and pressure
relief valve is to discharge water in large quantities in the
event of excessive temperature or pressure developing
in the water heater. The valve's relief pressure must not
exceed the working pressure of the water heater as stated
on the data plate.
Discharge line 3/4" minimum
Do not cap or plug.
6" maximum
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 & Pressure Relief Valve:
• Must not be in contact with any electrical part.
• 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 six inches above a floor
drain or external to the building. In cold climates, it is
recommended that the discharge pipe be terminated at
an adequate drain inside the building.
• Must be capable of withstanding 250°F (121°C) without
distortion.
• Must be installed to allow complete drainage of both
the valve and discharge line.
T&P Relief Valve and Pipe Insulation
1. Locate the Temperature and pressure relief valve on
the water heater (also known as a T&P relief valve). See
Figure 15B.
2. Locate the slit running the length of the T&P relief valve
insulation.
3 Spread this slit open and fit the insulation over the T&P
relief valve insulation. See figure 15B. Apply gentle pres-
sure to the insulation to ensure that it is fully seated on the
T&P Relief Valve. Once seated, secure the insulation with
duct tape, electrical tape, or equivalent.
IMPORTANT: The insulation and tape should not block
the discharge opening or hinder access to the manual
relief (Figure 15B). Ensure a discharge pipe is installed
into the T&P valve discharge opening per the instructions
in this manual.
4. Locate the hot water (outlet) & cold water (inlet) pipes to
the water heater.
Figure 15B
T&P Relief Valve Insulation
T&P Relief Valve
T&P Relief Valve
Drain Line
14
(Some Models)
Manual Relief Lever
T&P Relief Valve Insulation