Well water degassing

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I use a Tunze ATO pump you do not need much flow When that goes out I might switch to a different pump but not sure it would change anything. My degassing chamber is a section of 4" PVC that has a air stone at the bottom. That over flows into a 5 gallon water can that has a high/low tank controller hooked up on it upsidedown to remove water with the tunze pump to the DI resin.

High Low Controller: https://www.buckeyehydro.com/hi-lo-tank-level-controller/