I put in a new bathroom faucet. The drain has a 11/4" diamter tail. The existing trap is 11/2". I was advised by the local hardware store that to do the job right, everything should be 11/4" and not to use a reducer in order to attach the 11/2" trap to the 11/4" sink drain.
I didn't think of it at the time, but wouldn't a 11/4" drain going into a larger 11/2" provide for efficient draining? Or is keeping everything the same size a good rule of thumb?
The 1 1/2" trap will be just fine.
Depending on the trap material, there is a rubber reducing washer or a plastic one which the hdwr guy should have in stock.
Jim
I think the person at the h/w store is confused. There is no problems going from a 1 1/4 drain into a 1 1/2 trap. For that matter, you could just as easily go from a 1 1/2 drain into a 1 1/4 trap. In the case of a residential sink in a bathroom or kitchen, it really makes no difference at all if the pipes change from 1 1/2 to 1/1/4 here and there and back again.
you may be just fine, but your hardware guy may be right also. i think the same size design would help me now: i don't like my kitchen's
1-1/2" going into an old design 2" S-trap. it seems sluggish and struggles to push the drain water thru even with an auxiliary vent. i was the 1976 "plumber" and should have piped the tail into a 1-1/2" p-trap first. note that s-traps are not the usual recommended plumbing design these days.HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.