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Backflow Prevention Assembly Testing Manual
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BACKFLOW PREVENTION ASSEMBLY TESTING MANUAL
www.publichealth.lacounty.govBackflow Prevention Assembly Testing Manual Concept 4 check valve to atmospheric and observing the upstream pressure at which the check valve closes. Minimum acceptable value: 1.0 psi. Note: Accurate gauge readings of check valves are dependent on a solid downstream reference point. If the downstream test cock is at the highest point
RP/IS-009 Installation, Maintenance, & Repair Series 009 ...
media.wattswater.comSpecial considerations are necessary when testing assem blies installed on Fire Prevention Systems. Fire Protection System Installations: The National Fire protec-tion Agency (NFPA) Guidelines require a confirming flow test be conducted whenever a “main line” valve such as the shutoff valves or a backflow assembly have been operated.