What's your basis for requiring two backflow prevention devices? You can use the U-loop with the drilled check valve on the antifreeze system w/o a BFP but then your backflow protection between the sprinkler system and the potable water can no longer be just a double check BFP but must be a reduced-pressure type.
Roland On Jan 21, 2010, at 8:25 AM, Matt Grise wrote: > You are correct. There needs to be backflow protection between the > public/domestic supply and the sprinkler system, and also between > the wet system and the antifreeze loop. > > Matt Grisé PE*, LEED AP > Sales Engineer > Alliance Fire Protection > *Licensed in KS & MO > _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
