Plumbing · P-JMZ8S

Inline Water Heater Piping Detail

Materials

Elements

Walls Floors / Slabs Drainage Anchors / Embeds Connections / Plates

About this detail

Domestic water heaters are connected to cold water supply, hot water distribution, and hot water return piping with dielectric unions at connections. Gas supply lines feature a gas cock, dirt leg, and flexible gas connection. A domestic water expansion tank pre-charged to forty-five psig is supported from the structure overhead and tied into the cold water line. A mixing valve assembly includes a circuit setter, aquastat, pressure and temperature relief valve with a one hundred fifty psi capacity, and a discharge line run to a floor drain. Heat traps are installed on water lines above the heaters, and a full-size drain valve and pipe connect to a floor sink to balance and set the mixing valve. Recirculation pump RP-1 ties into the hot water return loop, and the heaters are anchored to the wall using a one-inch by eighteen gauge strap with number ten by two-and-one-half-inch wood screws.

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