[LazyPup]

Examine your new P-Trap kit.
Lavatory drains are 1 1/4 inch drains. Often in new construction the waste arms are 1 1/2inch pipe and they use a combination 1 1/4 or 1 1/2 P-trap. (the kits have two sets of compression sleeves, one for 1 1/4 and one for 1 1/2 x 1 1/4)
Make sure you P-trap is for 1 1/4,,,(not a combintation trap.)

Examine the parts for the P-trap, you should find:

1.one piece of tubing about 8 inches long with a 90 deg bend on one end and narrow flange on the end of the bend.
2. A shorter J-shaped piece of tubing that has a larger diameter on the longer end and threads on both ends.
3. You should have 2 slip nuts and one compression sleeves with the P-trap kit. The compression sleeve will be a narrow ring of semi-clear piece of platic that is bevelled toward one edge and will fit over the tubing.

To assemble the P-trap begin by selecting a slip nut and the long J shaped piece of tubing. Slide a slip nut onto the tubing with the open threaded side of the nut facing the tubing. Slide it the full length of the tubing until it stops at the flange on the end of the 90 deg bend, the threads should now be extening out over the flange and away from the pipe.

Now select the J-sahped piece of tubing. Notice that it has a larger diameter on the high side of the J and has threads on both ends. Fit the low side of the J (small diameter end) to the nut you installed on the long tube and screw the nut onto the threads snug but not tight. (You will need some movement in this joint to adjust everything as you go.)

Now examine the tailpiece coming down from the sink. It should be clean and smooth on the end. (The gunk you found on that is the remnants of soap, toothpaste and such.)

Select another compression nut an slide it up onto the tailpiece with the open thread side down.

Examine the compression sleeve and you will see that it is beveled to one side (wedge shaped)
Slide the compression sleeve onto the tailpiece with the thin side of the bevel down.
Slide the larger diameter end of the J part of the P-trap up on the tailpiece until the tailpiece hits the bottom of the enlarged part of the tube.
Now slide the compression sleeve down to meet the P-trap, then slide the nut down and thread it onto the threads on the end of the P-trap. Make it snug enough to hold in place but do not tighten at this time.
Examine the end of the waste arm where it extends out of the wall. If it is a metal pipe, there should be threads on the end of the pipe. There may be an existing compression nut on the end of the pipe, if so, remove it and use a rag to clean the threads on the pipe as best you can.
Slide a compression nut on the long piece of tubing on the P-trap, the open threaded side of the nut should be facing toward the end of the p-trap tube. Slide it back 2 or 3 inches, then slide another compression sleeve on the tube with the thin side of the bevel toward the end of the pipe.

The end of the P-trap tube should now slide inside the end of the waste arm pipe. (It should slide into the waste arm pipe about 1 1/2 inches, you may need to cut the end of the P-trap tube to fit)

You may also need to rotate the P-trap at its center coupling or on the tailpiece to align it to the waste arm. Once it is aligned and inserted into the waste arm, slide the compression sleeve up to the end of the waste arm, then slide the nut up and thread it onto the end of the waste arm pipe.

You may now tighten all joints. PVC should seal with hand pressure and should not require tools to tighten.