As someone mentioned before, the water purveyors have a lot to do with what is required. One of the larger water purveyors out here requires a full flow meter and double check in a pit near the tap. They do not require an RPZ because they know that RPZs and meter pits don't work so good. The theory is that whatever the customer does beyond that tap is "their business". Whether the customer would tap the main multiple times for future expansions or whatever, the water company's system is protected. So this leave the plumber and the sprinkler guy to install there own backflow preventers inside the building where the domestic and fire line split. I sorta understand the logic, but now the owner has at least two that need to be tested annually and I am not sure if the water company foots the bill for the maintenance of the BFP in the pit. I'd imagine they don't. At first glance, this would seem to be just a cost impact on the owner in the initial stages, but I have heard through the grape vine that RPZs can be a maintenance nightmare. Let alone a post Roland made some time ago, alluding to the fact that BFPs have a higher failure rate than a regular check valve. I guess two BFPs are better than one.
Best Regards, Ken Holsopple Design Manager Rowe Sprinkler Systems, Inc. 570-837-7647 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roland Huggins Sent: Friday, July 13, 2007 10:04 AM To: [email protected] Subject: Re: Backflow: Sprinkler System One of the aspects that drive an RPZ is when the fire dept draft from non-potable sources (anytime). Roland _______________________________________________ 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)
