Reduced pressure zone backflow preventer assembly definition

Reduced pressure zone backflow preventer assembly means a backflow prevention device which consists of two independently acting soft-seated check valves, internally force loaded to a normally closed position and separated by an intermediate chamber (or zone) in which there is an automatic relief port, which vents to atmosphere, internally loaded to a normally open position between two tightly closing shut-off valves, and which has means for testing the tightness of the check valves and opening of the relief port. A reduced pressure zone backflow preventer assembly includes a reduced pressure zone detector assembly for the purposes of this chapter.

Related to Reduced pressure zone backflow preventer assembly

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