Topsflo output size

Nmnbrewer said:

So received new topsflo 24v D.C. Pump from bobby today. Looks great other than the small output port (relative to input) size. I have read a lot about maintaining full port valves and lines etc etc but doesn't everything downstream seem irrelevant when the first orifice is the smallest along the line? I'm no hydrodynamic professional. Can someone enlighten me. I was considering returning some new 3 way valves due to their .47" port size but now I'm not so sure.

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augiedoggy said:

the truth is thats not how it works... the port size can restrict flow yes but the topsflo pumps can pump up to 5 gpm with the right power and in home brewing It might help if you explain what your trying to do with it that you believe you will benefit from faster flow?
Most people recirculate, sparge or chill at a much slower rate with ballvalves to restrict flow I use smaller 3gpm DC pumps and I turn those down half the time...

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Nmnbrewer said:

It will be used in a recirculating biab single vessel setup. Along the way will be 2-3 way t flow valves for redirecting flow into a CFC. I shouldn't need the full flow from the pump during the mash but I was hoping to maximize the flow during the cooling cycle as well as the whirlpool. I was just wondering in going from 1/2" tubing down to possibly 3/8" through the valves is going to significantly slow the flow down or just increase velocity. Again, I am no engineer. I do however tend to overthink things. In answer to your other question, I don't need faster flow. I'm just hoping to take advantage of the flow that does come out of the pump without putting too many roadblocks up.I hope this makes sense.

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