All of our PROBite Push On Fittings are compatible with CTS (copper tubing size) pipe, such as copper, CPVC and PEX. When installing tubing into our push on fittings, simply use the included stiffeners and slide the tubing in. Make sure the size of your tubing matches the size of your fitting. The Reducing Coupling 1/2" x 3/8" is sure to please.
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