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Old 06-27-2011, 03:03 PM   #1
Oct 2009
Hamilton Ontario
Posts: 27
Liked 3 Times on 2 Posts

Hi all,
My brother just gave me a little Grundfos hot water circ pump. It has a bronze housing and pumps 17 GPM. It was used for hot water recirc. I want to use it if I can for my brewery build, but I think the flow rate is way more than I need. I would like to get it down to 4 GPM.

I have a 120Vac Variac transformer rated for 10A. Could I use this to slow the pump down? or would a ball valve on the output side be better?

Thanks, Dan.

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Old 06-27-2011, 03:21 PM   #2
Bjornbrewer's Avatar
Jul 2008
St. Clair Shores, MI, USA, Earth, Sol System, Milky Way
Posts: 417
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If it's a magnetically coupled impeller then you can put a ball valve on the output side. Otherwise, the variac should work, but you might run into cooling problems if you run it too slow. depends on the motor type.
Sand Viking Brewery

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