If you're talking about paddle or vane type flow switches these are only allowed in wet systems. In fact since NFPA actually defines accepted types of systems and a wet/dry combination (I'm not talking about an auxiliary dry off a wet but one that is both things) is not mentioned then I'd say can't do it at all since this is not a case of if it's not addressed it's OK. Of course if a temporary course of action is to leave an ordinarily dry system wet without an alarm while repair parts were being ordered or shut it off I'd certainly opt for the former.
On Wed, Mar 19, 2008 at 3:21 PM, Ed Vining <[EMAIL PROTECTED]> wrote: > What about the alarm Pete? The valve to the WMG or pressure switch > must be turned off after the DPV trips. One could add a waterflow > indicator and pretend it is a shotgun riser. > > Ed > > On Wed, Mar 19, 2008 at 1:07 PM, Larrimer, Peter A > <[EMAIL PROTECTED]> wrote: > > Forum Members: > > > > If a dry pipe valve trips and "goes wet", is there any reason why you > > couldn't leave the system piping filled with water assuming that the > > weather is not cold enough to freeze it? I am assuming that the > > clappers have been reset externally and that the alarm connections > > remain dry since they don't seem to be having problems at this time. > > > > Why would they want to use an alarm valve in place in liew of just > > leaving the dry pipe valve? > > > > Thanks in advance. > > > > Peter Larrimer > > VA > > > > > > _______________________________________________ > > 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) > > > > > > -- > Ed Vining > 4819 John Muir Rd > Martinez CA 94553 > 925-228-879 > _______________________________________________ > 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) > -- Ron Greenman at home.... _______________________________________________ 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)
