Mechanical · M-53CBG

Non-Potable Electric Water Heater Detail

Materials

Elements

Walls Floors / Slabs Insulation Drainage

About this detail

An electric water heater sits on a four-inch concrete housekeeping pad over a minimum R-10 incompressible insulated pad and a galvanized steel drain pan with a three-quarter-inch copper drain line routed to the nearest drain. The unit features a pressure-temperature relief valve and a vacuum relief valve installed six inches above the tank. Piping includes heat traps, thermometers, temperature transmitters, shut-off valves, check valves, unions, a circulation pump, a balancing valve, and an expansion tank with a capped drain. A reduced pressure principle backflow preventer assembly for the non-potable hot water system is located on the wall between thirty-six and sixty inches above the finished floor, with drain pipes routed full size to the nearest drain. Seismic restraints are provided to the floor and wall, and check valves remain uncovered by pipe insulation with removable covers provided.

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