Hi *"(2) A method to isolate the pressure-regulating device(s) shall be provided for maintenance and repair." *shall apply when the prv is connected between the pump and the system. if it is provided for any angle valve it is not required.
With warm regards *D.RADHAKRISHNAN* Mobile: 00971 55 967 4864 <[email protected]> On Wed, Sep 6, 2017 at 10:26 PM, Tony Silva <[email protected]> wrote: > NFPA 14, 2010, 7.2.4 (4) requires a bypass across a prv. Is it only when > multiple smaller prv's are used instead of a larger prv, or whenever any > prv is used? > > My application is there is a prv at the floor control stations supplying > combined sprinkler/standpipe. Would this prv need a by-pass? > > The other question is will every prv need control valves upstream and > downstream? > > I know it is good engineering practice to have the valves and by-pass, but > very often there is not much space inside the stairs. What is the general > industry practice? > > Thanks, > > Tony > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > >
_______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
