Depends on what the water purveyor tells you to use, at least out here in Enviroworld. For example, out of the 20+ largest water companies in Southern California, I would guesstimate that the split is about 60% DCDA and 40% RPDA.
Steve Leyton PROTECTION DESIGN & CONSULTING -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Todd Williams - work Sent: Thursday, July 12, 2007 2:59 PM To: [email protected] Subject: Backflow: DCDA vs RPZ What is everyone installing on systems from potable water with an FDC but no chemical addatives, a DCDA or an RPZ? Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut 860-535-2080 www.fpdc.com _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
