Plumbing · A-BGXTE

Water Heater Installation Details

About this detail

Two distinct water heater installation configurations. The upper detail shows a vertical water heater floor-mounted on a sheet metal pan, equipped with ball valves, a Watts 40L temperature and pressure relief valve, a thermal expansion tank, and seismic straps secured to the wall using three number 14 self-tapping screws for steel studs. Piping connections include three-quarter-inch cold water and hot water lines, a three-quarter-inch relief line, and a drain directed to an approved receptor, with dielectric unions required for ferrous to non-ferrous connections. The lower detail shows an above-ceiling suspended water heater installation supported by half-inch rods and earthquake proof straps, sitting on a sheet-metal platform with a drip pan and drain. This assembly features an ET-1 expansion tank, a T-P relief valve, and a drain line running down to an air gap fitting below the sink counter along with a half-inch trap primer line. Structural support utilizes overhead framing with clearance provided per the National Electrical Code.

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