Attachment_4_-_Original_BFPs_(section_15141_Manual_info)_0001.pdf

This is an operation and maintenance manual for Watts Regulators Series 909QT-S and 909OSY reduced pressure zone backflow prevention assemblies, covering sizes from 3/4" to 10". The manual provides detailed specifications, installation instructions, testing procedures, and servicing guidelines for these potable water piping system components.

The assemblies are designed to prevent backflow and backsiphonage of hazardous materials into potable water supplies through cross-connections, meeting requirements of ASSE Std. 1013, AWWA C511-92, and other relevant standards. Key features include replaceable bronze seats, stainless steel internal parts, captured spring check assemblies, and air-in/water-out relief valve design. The units operate in temperature ranges of 33°F-140°F with maximum working pressure of 175 psi. The manual includes detailed diagrams, capacity charts, dimensions, testing procedures, troubleshooting guides, and parts lists for servicing and maintenance. Manufacturer contact information is provided for Watts Regulators through Phoenix Marketing, Ltd. in Albuquerque, NM.