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PVB4A Series Installation, Operation, and Maintenance Manual—Pressure Vacuum Breaker (PVB) Backflow Preventers ½″-2″, Conbraco Industries Inc. (May 2009). |
PFMM PVB4A Installation, Operation, & Maintenance Manual—½″-2″ Pressure Vacuum Breaker (PVB) Backflow Preventer, Apollo Valves (Jan. 2012). |
Wilkins Model 420XL Lead-Free Pressure vacuum Breakers (½″ & ¾″) (2012). |
Installation, Maintenance, & Repair Series 800M4 and LF800M4—Anti-Siphon Pressure Vacuum Breaker featuring Replaceable Seats (2013). |
Series 765 Pressure Vacuum Breakers Specification Sheet—FEBCO (2009). |
Lead Free Series LF800M4QT Anti-Siphon Pressure Vacuum Breakers—WATTS (2013). |
BFMMPVB Maintenance Manual—Series 4V-500 (½″-2″ Pressure Type Vacuum Breaker)—Conbraco Industries, Inc. (Apr. 2002). |