Why such concern over pump GPM? - Home Brew Forums
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Old 12-05-2013, 12:11 AM   #1
RichBenn
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Aug 2009
Tahoe
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I see many threads where people obsess over how all things related to pump GPM, lift, etc. Besides lift and basic pump capabilities such as head and flow, this also includes:
- Elbows (which reduce flow)
- Hose barb inside diameter

I have both a Chugger inline and a US Solar pump. both have to be throttled significantly using a valve on the output for recirculation and sparging, otherwise compaction would seem to be a problem.

I do understand how you want unobstructed input flow and some height above the input to avoid cavitation. (Not been a problem for me with proper pump location and orientation). And some using it for whirlpool have not been happy with the outut of a US Solar (3 GPM), getting fast enough for a good cone.

Am I missing something? Are there flow problems I don't yet know about? Especially for the March and Chugger pumps.

Regards,
Rich
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Old 12-05-2013, 12:19 AM   #2
aquenne
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Oct 2011
Paris, Ontario
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Well, coming from a HERMS system, I want maximum flow to improve the heat transfer. The quicker I can recirc the mash, the quicker I can bump temps.

 
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Old 12-05-2013, 12:49 AM   #3
RichBenn
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Quote:
Originally Posted by aquenne View Post
Well, coming from a HERMS system, I want maximum flow to improve the heat transfer. The quicker I can recirc the mash, the quicker I can bump temps.
Don't you get grain compaction when you go fast?
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Old 12-05-2013, 05:22 AM   #4
day_trippr
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May 2011
Stow, MA
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When you're pushing wort through a long skinny hex tube, that "fast" may be your "throttled"...

Cheers!

 
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Old 12-05-2013, 01:31 PM   #5
RichBenn
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Aug 2009
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Gotcha. I'm switching over to HERMS soon, so this is useful info. Right now, I have the output valve nearly closed to get the right flow on the Chugger.
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