Yes, backflow preventers reduce static pressure and the amount depends on the device. Look at the performs curves of the device. A typical double check will have a 4 PSI reduction in static pressure across the device at 0 GPM . Sincerely, Joe Kuerzi Jr.
Certified Protection Services LLC 175 Sky Aire Rd. NW Corydon, IN 47112 Fire Protection & Water Back-flow Prevention Systems Installation, Maintenance, Repair, & Inspections Contact - Joseph C. Kuerzi Jr., SET 812-738-2970 office 502-551-8530 mobile *preferred [email protected] On Thursday, August 13, 2026 at 09:07:35 AM EDT, Matt Grise <[email protected]> wrote: do backflow preventers typically reduce static pressure? The charts provided with BFP's do show a loss at 0gpm, but is loss the same when flow is increasing and decreasing? I usually apply the pressure loss from a BFP at a flowing condition, so I'm not sure how they affect static condition. Anyone know? Thanks! Matt Grise _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]
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