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The connection of the tubing on the detector-side can be either 1/4" (chiller-side is 3/8", output is 1/4") or 3/8" self-sealing quick connects. On the pump-side, they can be 1/4" (chiller-side is 3/8", output is 1/4") or 3/8" push-to-connect fittings:
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