Plumbing question - how to connect 1 1/2" pipe to 1 1/4" pipe?

If the threads are good on the stubout, (the pipe coming out of the wall), use a 1 1/2 to 1 1/4 slip joint nut and washer. This is first choice.

If not, go buy a Fernco, or Cantex rubber trap adapter at any hardware and most lumber stores. Size the adapter accordingly. You should look for the adapter that will work on 1 1/2 ip size to 1 1/4 tubular size.

The home improvement store does have the right parts. Look in the plumbing section where you buy traps for your sink and extension tubes for sink drains. In the package with these parts are 2 washers. One is the proper thickness for connecting 1-1/2" to 1-1/2" and 1-1/2" to 1-1/4" . Thats all you need.

Investigate the plastic waterlines. Both glued pvc and the pex brand. Both are modern alternatives to traditional copper piping. If properly installed they have a good service record and are generally acceptable with most building departments. Copper is great but sometimes difficult to retrofit to old construction as well as being expensive. In most modern homes today there is always some sort of plastic water or drain lines being used. The reason being it is made very tough now and actually outperforms other traditional materials. Copper waterlines are not permanent. They can corrode from the inside out if exposed to acidic water for prolonged periods. As you can tell I am a fan of the plastics. Having built a number of houses using both materials I would alway choose the plastic over copper. Nuf said. Hope this helps.

The big home improvement stores definitely have reducers...

from what I am guessing...(to try to simplify) the piece you will need has a screw connection at the top of it..will only be about 3 inches long...straight...looks a bit like the pipe has a cap on it but the cap has a hole in it, that is where the drain pipe goes and you tighted it

if at all possible take the drain pipe with you to make sure you get the right size

in the slip joint (trap adapter)where the trap connects to the house WDV there is a plastic seal. There are two sized rings that will both fit this connection.one is for 1 1/2" pipe and the other is for 1 1/4".

yes there are connectors out there you should find a good plumbing store and ask for a reduction connector for 1 1/4" to 1 1/2" pipe good luck :)

buy 1 1/2 to 1 1/4 reducer coupling

you can use the regular 1 1/2" slip joint nut but with a 1 1/2" x 1 1/4" reducing slip joint washer to connect to the pop up assembly. any hardware store should have one but if you bought a new p-trap it should have came with one too.

Bathroom Sink Drain Size

OH SURE THEY DO. Its just a 1 1/2 to 1 1/4 reducer.