Plumbing · P-73MSM

Electric Water Heater Piping with Recirculation Detail

Elements

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An electric water heater connects to the domestic hot water supply and recirculation system above the floor line. The assembly includes a pressure and temperature relief valve discharging to a floor drain, dielectric unions, shut-off valves, and thermometers. Hot water recirculation piping incorporates a circulation pump, swing check valve, balance valve, and time clock control. An expansion tank is installed on the recirculation loop, and energy-code-compliant heat traps are provided on the piping connections.

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