I take small tubing from sensor to a barbed fitting to a brass fitting to a fitting for the 5/16 drop lines.

https://www.amazon.com/dp/B0015HL24A...lig_dp_it&th=1
https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1
https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1


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