Step 6 · Install the Push-to-Connect Fittings
First, clean and deburr the ends of your new pipe section, just as you did for the existing pipe. For the initial connection, take a standard push-to-connect coupling and push it firmly onto one of the existing pipe ends with a slight twisting motion until it hits the insertion depth mark. You should feel a 'click' as the internal teeth grab the pipe. Now, take the new pipe section and push it into the other end of that same coupling, ensuring it reaches the depth mark. For the final connection, which is difficult with a standard coupling, use a push-to-connect slip coupling. Push the slip coupling completely onto the free end of your new pipe section. Align the new pipe with the remaining existing pipe end. Now, using the special disconnect clip, slide the slip coupling back over the joint until it is centered between the two depth marks. Give all connections a firm tug to ensure they are securely locked in place.