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das75

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Is there a table or formula for figuring at the flow based on slot size on an overflow?

I've got 23 closed slots 1.5"x 0.125" over 13 inches.
 

ChrisRD

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Upstate NY
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Yes, it's called orifice flow (weir flow would apply for an overflow with no teeth). When I was designing my last overflow box, I developed a spreadsheet using the orifice formula to determine how high up the slots the water line would be at different flow rates. If you PM/email your email addy I can send it to you...
 

ChrisRD

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Upstate NY
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RC is down at the moment so I can't double check, but last time I looked there, their overflow calculator was for weir flow. Not really applicable to an overflow box with teeth...
 

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