There is nothing in the waterway that would impede flow other than the paddle for the flow switch. I've never seen any friction or equivalent length info in the flow switch literature (I checked Potter), so I would think that the length of pipe would be about it.

At 02:35 PM 1/25/2008, you wrote:
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Question…

What has / have any of the forum designers done in relation to adding a
“length” or “psi loss” to the hydraulics for a riser manifold (such as
Tyco’s Model 513).  Looking through the spec’ sheet, I can’t find anything
that would give me something ­ unless I’m blind… and it is Friday!  I know
that it would be fairly ‘minimal’ with only the paddle and the gage impeding
the water characteristics.  Any input would be greatly appreciated.



Thanks!



RFI Chuck


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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
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