For a float switch (KENT THAT IS ) you need a 5/8" hole for the switch so i guessing it's 1/2" or 3/8.
mike why not get a rubber gasket for the float switch to where the piece connects to the PVC.
mike
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180 starfire front, LPS, millipora
Doesn't matter how much you have been reading until you take the plunge.
You don't know as much as you think.
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