The Principle Operation of a Backflow Prevention Device for Beverage Dispensing Equipment – Installation Considerations

The BPBDE shall be installed in a location that is accessible for servicing, maintenance and for the periodic inspection of atmospheric vent. The BPBDE atmospheric port is designed to open to the atmosphere and discharge carbon dioxide gas or water from the vent in the event there is a backflow condition and the second check valve fouled and does not close properly. The BPBDE shall not be installed inside walls or in concealed location. Since the BPBDE atmospheric vent is designed to discharge water during normal operations, the BPBDE shall be located where water discharge will not cause water damage to the surrounding area. A vent discharge line shall be connected to the atmospheric port outlet and directed to a location with adequate ventilation and suitable drainage arrangement with the proper air gap arrangements. The atmospheric port or vent line shall in no circumstance be plugged. If the potable water system is connection to a carbonated beverage dispenser post- mix type, the piping downstream of the BPBDE which, is installed to prevent carbon dioxide gas and carbonated water from entering the potable water system, shall not include copper piping. Copper tubing may be used downstream for non-carbonated beverage dispensing systems providing that the piping downstream is not affected by carbon dioxide gas. The BPBDE shall be installed with the arrow pointing in the direction of flow and can be installed vertically or horizontally. The BPBDE should be equipped with a strainer installed upstream of the BPBDE or it should be equipped with an integral strainer screen. The strainer insures debris will not enter the carbonator. The BPBDE shall not be installed where the pressures or temperatures exceed manufactures recommendations or other installation specifications. To prevent the filtered potable water used to supply water to the carbonated mixer from getting into the potable water system supplying the water filtration system, an ASSE 1024 or ASSE 1032 dual check valve shall be installed prior to the water filtration system and pump. This backflow prevention device is installed for hydraulic purposes and not for cross-connection control since the ASSE 1024 is installed between two potable water systems