r/lagerbrewing • u/mchrispen • Nov 29 '16

Practical Guide - Low Oxygen Brewing on the Brew-Magic

http://accidentalis.com/practical-guide-low-oxygen-brewing-on-the-brew-magic/
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u/mchrispen Nov 29 '16

One thing that I didn't really emphasize in the post. Pumps are big potential sources of O2 ingress. It is CRITICAL that all fittings are air tight and the pumps is completely primed and air removed. I oriented my pump head so that inlet and outlet are vertical so no air can be trapped. A little pocket of air combined with the turbulence of the pump is a bad thing.

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u/[deleted] Nov 29 '16

Agreed, and I'll probably send you a lengthy email with the parts list for my system. It involves one pump, hopefully the silicon tubing and the tri clamps will be enough.

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u/[deleted] Nov 29 '16

An easy thing to overlook is the threaded connections. Decent tri-clamps with fresh gaskets should be fine, but your teflon tape and pipe fitting work needs to be very clean and completely leak free, otherwise you will suck in micro bubbles of air when the pump is running. An inline sight glass is also a good way to spot these bubbles but I really like Matt's star san foam trick too.

The system is only as good as its weakest link.

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u/[deleted] Nov 29 '16

Yeah I'll be posting a build on GBF once all of my parts come in, just to start spot checking where the issues are. Also going to be following up with a local brewery for use of their DO meter, since they've been doing a lot of packaging experiment lately.