Plumbing · P-Z3Z25

Water Heater and Mixing Valve Plumbing Piping Schematic

Materials

Steel Stainless Steel Metal (misc.)

Elements

Walls Floors / Slabs Bracing Drainage

Connections

Bracing Connection

About this detail

This diagram details the piping schematic for a commercial domestic hot water system featuring multiple building water heaters operating at 150°F, a storage tank, a heat exchanger, and a thermostatic mixing valve delivering 140°F hot water to the building. The equipment sits on housekeeping pads with incompressible insulated pads having a minimum R-10 value and stainless steel drain pans. The system incorporates heat traps, expansion tanks, pressure and temperature relief valves, vacuum relief valves, and circulation pumps with full-size drain piping routed to the nearest drain. General notes require seismically bracing the water heater to the wall and installing the thermostatic mixing valve per manufacturer guidelines.

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