Two Commercial Atmospheric Vent with Two Storage Tanks & Return

TWO COMMERCIAL ATMOSPHERIC VENT WITH TWO STORAGE TANKS & RETURN CIRCULATION 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 (2)

SHUT OFF VALVE (2) UNION (2)

DRAIN OUTLET (2)

UNION (2) SHUT OFF VALVE (2)

HOT WATER TEMPERATURE AND PRESSURE RELIEF VALVE (2)

FLUE DAMPER (2) DISCHARGE TUBE (2) UNION (2) TEMPERATURE AND PRESSURE RELIEF VALVE

SHUT OFF VALVE FLOOR DRAIN (2)

BACK-FLOW PREVENTER

CONTROL BOX (2)

CIRCULATOR

GAS VALVE (2)

SYSTEM RETURN SHUT OFF VALVE

DISCHARGE TUBE (2)

WATER SUPPLY DRAIN OUTLET (2) FLOOR DRAIN (2)

EXPANSION TANK* SHUT OFF VALVE

BACK-FLOW PREVENTER