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This Ecopoly coupling lets you join two runs of 1/2 inch PEX tubing with a standard copper crimp ring or stainless steel PEX clamp. It's built from polysulfone (PSU) plastic rated for potable water use, so it holds up well in RV fresh water systems where corrosion-prone metal fittings can be a hassle.
To install, square-cut the tubing, slide a ring or clamp over each end, push the barbed coupling in fully, then crimp the ring about 1/8" from the fitting body.
