make the compression fitting connection to the valve and twist the handle clockwise to close the valve. Place the valve’s gasket and frame around the water pipe where the connection will be made ...

add tee fittings made of the same material. If you don’t want to solder, you can cut the copper water pipe and install a 5/8-in. O.D. compression tee instead (just don’t use them inside walls ...

When plumbing with PEX, you can use stab-in or compression fittings to make the connections ... PEX can’t be directly connected to a water heater. First extend a pipe 18 in.