This has been an ambiguous issue for many cycles. It was explicitly
addressed at the recent ROP meeting for NFPA 25 where it was accepted
that the main drain test (to be called a water supply test) is to test
the condition of the lead-in and only needed to be tested a single
time (not once for every system on the manifold whether horizontal or
vertical supplied by the lead-in) See ROP 25-3. Needless to say,
this can change at the ROC or the floor vote at the convention.
Roland
On Apr 11, 2012, at 10:46 AM, Greg McGahan wrote:
When you have a building with multiple floor control valves I have the
following question:
If the intent of the main drain test is to test the supply, can you
accomplish that by flowing the largest or the furtherest from the
riser
instead of flowing each one individually?
Thanks,
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