ld atmospheric vent models with return

THREE RESIDENTIAL/LD ATMOSPHERIC VENT MODELS WITH RETURN CIRCULATION SHUT OFF VALVE

THIS DRAWING SHOWS A SUGGESTED PIPING CONFIGURATION AND OTHER DEVICES; CHECK WITH LOCAL CODES AND ORDINANCES FOR ADDITIONAL REQUIREMENTS.

SYSTEM RETURN

CIRCULATOR

WATER SUPPLY

BACK-FLOW PREVENTER

*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.

BACK-FLOW PREVENTER

SHUT OFF VALVE

SHUT OFF VALVE UNION EXPANSION TANK*

SHUT OFF VALVE

SHUT OFF VALVE UNION

SHUT OFF VALVE UNION

SHUT OFF VALVE UNION

T&P RELIEF VALVE HOT WATER

DISCHARGE TUBE

UNION

T&P RELIEF VALVE DRAIN DRAIN OUTLET DISCHARGE TUBE

DRAIN OUTLET

SHUT OFF VALVE DRAIN DRAIN OUTLET SHUT OFF VALVE UNION DISCHARGE TUBE DRAIN

UNION T&P RELIEF VALVE