two commercial hd electric models with return circulation

TWO COMMERCIAL HD ELECTRIC MODELS WITH RETURN CIRCULATION HOT WATER THIS DRAWING SHOWS A SUGGESTED PIPING CONFIGURATION AND OTHER DEVICES; CHECK WITH LOCAL CODES AND ORDINANCES FOR ADDITIONAL REQUIREMENTS. *EXPANSION TANK RECOMMENDED TO MINIMIZE ANY PRESSURE BUILD UP IF THE WATER SUPPLY PIPING HAS A BACK-FLOW PREVENTER, CHECK VALVE OR WATER METER WITH A CHECK VALVE.

SHUT OFF VALVE (6 PLS.) UNION (6 PLS.)

T&P RELIEF VALVE

BACK FLOW PREVENTOR CIRCULATOR PUMP SHUT OFF VALVE

DISCHARGE TUBE SYSTEM RETURN DRAIN WATER SUPPLY

EXPANSION TANK* SHUT OFF VALVE BACK FLOW PREVENTOR

VIEW OF SINGLE WATER HEATER WITH NO PIPING CONNECTIONS