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8
PIPING INSTALLATION
NOTE:
The most effective means for preventing deterioration from accelerated corrosion due to galvanic
and stray current is the installation of dielectric fittings/unions. The installation of these fittings is the
responsibility of the installing contractor.
1. Connect the cold water inlet and tepid water outlet to the appropriate connections as shown below;
refer to the drawing for location and sizes.
2. Install the combination temperature and pressure safety relief valve in the tapping provided. Note that
this is required by law for safety considerations.
Install into provided tapping Manual Release Lever
Temperature Probe
Outlet to floor drain
Temperature and Pressure Relief Valve
3. Install a relief valve overflow pipe to a nearby floor drain. CAUTION: No valve of any type should
be installed between the relief valve and tank or in the drain line.
4. On startup, thermal expansion will cause the water to expand. Hubbell recommends that a thermal
expansion tank or supplementary pressure relief device be installed in the hot water outlet to allow
for this expansion.