Mark the CPVC pipe at the point where the shut-off valve will be installed. Place the pipe in the jaws of a tube cutter, resting the blades on the mark.
Squeeze the tube cutter's handles together to make a clean straight cut through the pipe. If any burrs exist on the cut pipe end, scrape them off with a utility knife.
Brush polyvinyl chloride (PVC) primer to the outside end of the CPVC pipe. Prime the CPVC inner sleeve on the inside of the valve's inlet as well. Brush PVC cement to the primer area on the outside of the pipe and the valve's primed inner sleeve.
Push the pipe quickly into the valve's inlet and hold it in place for 5 seconds while the cement dries. If the CPVC pipe has already been installed to the end of the water line, when pushing the valve onto the pipe make sure the valve handle is positioned so that it can be easily accessed.