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Installation instructions
Connecting the pressure relief valve (PRV)
A listed pressure relief valve must be installed at the
time of installation. No valve is to be placed between
the PRV and the heater. No reducing coupling or
other restriction may be installed in the discharge line.
The discharge line must be a minimum of 4” above a
drain and installed such that it allows complete drainage
of both the PRV and the line. The discharge line must be
placed where it will not cause any damage.
The location of the PRV must be readily accessible for
servicing or replacement, and be mounted as close to
the water heater as possible. See Fig. 34. To install the
PRV, a suitable fitting connected to an extension on a
“T” fitting can be sweated to the hot water line.
Support all piping.
Fig. 34 Plumbing Connections (with shutoff valves)
and Pressure Relief Valve
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