Use PVC for a bathroom sink drain trap.
Plumbing a bathroom sink drain with PVC is far less complicated than having do so with steel or brass drain piping. PVC will also last much longer than either of them because PVC doesn't rust. Also, PVC is a much cheaper alternative to metal drain pipes.
Instructions
1. Determine the height from the wall drain to the tail end of your sink drain. Trim your extension tube with a hack saw to fit the height. Depending on the height, you may not have to use an extension tube. An extension tube, as its name implies, extends the tail end of your sink drain to meet your P-trap.
2. Install the extension tube to the tail end of your sink's drain, using the slip nut to lock it in place.
3. Measure the distance from the wall drain to the center of the bathroom sink's drain. Trim your P-trap with your hack saw to fit this distance.
4. Insert the bottom pipe of the extension tube into the P-trap and tighten the slip nut. If there is a drain in the floor instead of in the wall, you will need an S-trap. The installation for that is the same for this type of drain system.
5. Insert the P-trap into the wall drain, threading the slip nut from the P-trap onto the threads of the wall drain.
Tags: sink drain, extension tube, wall drain, your sink drain, bathroom sink, tail your