Chuck,
I would think that valve should be included. It allows the dry system
to remain in service while the wet is being worked on. (If I'm
reading this right)
Todd
At 02:46 PM 3/28/2007, you wrote:
Forum,
*envision if you will...*
Underground piping enters building - sprinkler point of connection is
'typically' @ 1'-0" a.f.f. at which we provide a gate valve - backflow
assembly (or similar) - gate valve; then we proceed to our system.
Next, envision a dual system - (1) wet and (1) dry... After the gate -
a tee which branches off en route to the dry system... include a gate
valve - dry pipe valve- piping to system. Off the tee outlet we go to
the wet system... gate / b'fly valve - riser manifold - piping to
system. Question: can this valve (whether a gate of b'fly) be omitted?
I've seen it installed both ways - arguing that the gate on the
discharge side of the B.F.P. and the Gate on the suction of the Dry can
both be closed to isolate work on the Wet - if and when needed. I have
been on both sides of the argument... dependent on the job / zones /
etc... I've searched through NFPA 13 and cannot locate a specific code
or installation practice that lays this to rest. Anybody else?
Much Appreciation in advance.
Chuck H.
*go Twins*
_______________________________________________
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)
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)
