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Old 01-11-2013, 05:05 AM   #1
Sep 2007
Gresham, Oregon
Posts: 134
Liked 1 Times on 1 Posts

I have ball valves on my mash tun and boil kettle. Do I need to also put them on the output of the pumps I use or is controlling the flow with the ball valves at the kettle and mashtun good enough?

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Old 01-11-2013, 05:10 AM   #2
LandoLincoln's Avatar
Feb 2011
Joliet, IL
Posts: 2,989
Liked 1115 Times on 588 Posts

No no no. Don't ever control the flow upstream. Always control the flow downstream. Beer pumps are not self-priming and they do not like being starved of wort when running.

Assuming that you're using your standard March / Chugger beer pump.

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Old 01-11-2013, 05:14 AM   #3
Feb 2010
Pensacola, Florida
Posts: 634
Liked 16 Times on 15 Posts

Yes you control the speed of liquid movement with the ball valve on the pump output. If you have the kettle valve that feeds the pump partially closed, you run the risk of starving the pump and losing prime.
Originally Posted by djsethall View Post
It's like a big hot douche for my brewery.

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Old 01-11-2013, 01:26 PM   #4
ChandlerBang's Avatar
Oct 2010
Posts: 3,044
Liked 26 Times on 24 Posts

Also, if you try to throttle the flow farther past the pump than the discharge you may blow the hose off. Like if you are pumping through a valve at the destination. Always use a valve at the pump discharge.
Originally Posted by D_Struct View Post
I would've made a crayon schematic if I thought this was going to hang people up.

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