Brad,

I'd like to ask about your comment:

"good sense to waive off sprinkler calcs as meaningless."

Can you help me understand what you're referring to here?

I thought the concern was valid. The FM appeared to be asking a legitimate question, such as "what happens if the flow at 150% of rated capacity draws my municipal main down below 20 psi?" The 2010 edition of NFPA-20 addressed this in the sections I quoted Brian. I wasn't there for those ROP/ROC meetings, but the new material was voted in almost unanimously.

Reading that new language in NFPA-20, it also brought up a point I hadn't considered - isn't there a requirement to test the fire pump to that 150% capacity? I thought NFPA-25 called for that in the annual flow testing in 8.3.3.1. If the municipal main can't supply the water to meet that 150% figure I'd ask the same questions, I think. Perhaps a different way than happened for Brian, but I'd ask.

Are you suggesting that such information is irrelevant?
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Ken Wagoner, SET
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On 11/17/2010 11:29 AM, Brad Casterline wrote:
This FM's problem is
that he/she has the good sense to waive off sprinkler calcs as meaningless.

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