Yep and I have even run across 3.5".  Usually both that and 3" have 2.5" 
couplings.

And correct don't use HW.  Mfg or the NFPA handbook have methods.

Chris
-----Original Message-----
From: [email protected]
Sender: [email protected]: Wed, 6 Apr 2011 16:26:26 
To: <[email protected]>
Reply-To: [email protected]
Subject: RE: HW for hose

Never knew there was a 3" hose????Is this a manual wet or dry 
standpipe?Either way the 500 gpm requirement is at the FDV on the 
standpipe,unless I have missed something (which is very possible!).

Lamar Vaughn,SET


On Wed, Apr 6, 2011 at 4:09 PM, Greg McGahan wrote:

> If you have to calculate a manual standpipe, what HW coefficient do 
> you use
> for standard fire hoses?
>
> and what internal diameter is a 3" hose?
>
> Thanks,
> Greg
>
> -- 
> Greg McGahan
> Living Water Fire Protection, LLC <http://www.livingwaterfp.com>
> 1160 McKenzie Road
> Cantonment, FL 32533
> 850-937-1850
> fax 850-937-1852
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