four commercial atmospheric vent with return circulation
SHUT OFF VALVE CIRCULATOR
FOUR COMMERCIAL ATMOSPHERIC VENT WITH RETURN CIRCULATION
SYSTEM RETURN WATER SUPPLY
SHUT OFF VALVE
BACK-FLOW PREVENTER
UNION (4)
SHUT OFF VALVE EXPANSION TANK*
SHUT OFF VALVE (4)
TEMPERATURE AND PRESSURE RELIEF VALVE (4)
DISCHARGE TUBE (4) HOT WATER GAS VALVE (4)
FLUE DAMPER (4)
CONTROL BOX (4) FLOOR DRAIN (4) OUTLET DRAIN (4)
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.
FOUR COMMERCIAL ATMOSPHERIC VENT WITH RETURN CIRCULATION
SYSTEM RETURN WATER SUPPLY
SHUT OFF VALVE
BACK-FLOW PREVENTER
UNION (4)
SHUT OFF VALVE EXPANSION TANK*
SHUT OFF VALVE (4)
TEMPERATURE AND PRESSURE RELIEF VALVE (4)
DISCHARGE TUBE (4) HOT WATER GAS VALVE (4)
FLUE DAMPER (4)
CONTROL BOX (4) FLOOR DRAIN (4) OUTLET DRAIN (4)
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.
