1 1/4" drain to 1 1/2" wall inlet

Fubar411

Fubar411

New Member
Messages
141
Reaction score
0
Points
0
Location
St Louis, MO
I'm putting in a new lavatory sink. The sink has a 1 1/4" drain and the wall has a 1 1/2" inlet. What is the best way to do this? I bought a new 1 1/2" P trap, but the 1 1/4" drain seems to float in it.

Obviously, L0wes was not much help. I will be hitting a plumbing supply store tomorrow.
 
If you are using ABS pipe and fittings, you can pick up a 1 1/4 x 1 1/2 trap adaptor. The 1 1/4 side is a slip fit compression that fits over your 1 1/4 P.O. plug (Tailpiece)
 
krow said:
Very standard product found just about any plumbing store , hardware store, lowes or HD
Click to expand...

The key at Big Box is finding someone that knows what they are and knows in what illogical location they would be at.
 
Redwood said:
The key at Big Box is finding someone that knows what they are and knows in what illogical location they would be at.
Click to expand...

Very true, I guess it makes it easier when you know what you are looking for and you don't have to ask for help from the associates :D :D
 
Plumbers typically buy 1.5" pvc p-traps with ABS trap adapters, and both the 1.5" and 1.5x1.25" slip joint washer in the bag together.

You should be able to get the 1.5" x 1.25" washer at the big box too.

Nice about being a plumbing and buying from plumbing supply's and not big boxes,
We get what "we" like to use
They don't put gummy stickers on everything.
The quality is better.
 
Thanks. It turns out I was using the right adapter all along. I was somewhat concerned as it didn't seem airtight (new pvc, I did a "blow" test, no jokes please!)

Worked out great.

So for a lav sink, do you usually stub out a 1 1/2" or 1 1/4" screw adapter?
 
frenchie said:
. Code calls for 1-1/2 in the wall.
Click to expand...
The codes in my area call for 1 1/4" through wall for a wash basin. Plumbers use 1 1/2" because its 1/3 the price per fitting.

1-1/4" fittings cost 3 times more in my area than the 1-1/2" fittings
 
Fubar411 said:
Thanks. It turns out I was using the right adapter all along. I was somewhat concerned as it didn't seem airtight (new pvc, I did a "blow" test, no jokes please!)
Click to expand...

Not a joke, but a question ... did you put your mouth on the open sanitary sewer pipe? :eek:
 
Fubar411 said:
I'm putting in a new lavatory sink. The sink has a 1 1/4" drain and the wall has a 1 1/2" inlet. What is the best way to do this? I bought a new 1 1/2" P trap, but the 1 1/4" drain seems to float in it.

Obviously, L0wes was not much help. I will be hitting a plumbing supply store tomorrow.
Click to expand...

I am having a similar problem, but no matter what i do it always leaks.

I have 1 1/4" sink drain and 1 1/4" pipe sticking out of the wall.

because of the odd height angle and hight difference of my new cabinet and sink i have to use an acordion p trap but they only come in 1 1/2" so I used the adapter plastic rings and no matter what i do it leaks from the adapter to pipe in the wall. I tried leaving tightening it with a pipe wrench a little at a time till the plastic was stripped. tried a different one leaving it somewhat loose. I tried putting some rubber o rings on before the adapter ring. and i tried calking it with silicone and no matter what it always leaks.
I cant adapt from 1 1/2" to 1 1/4" and not have it leak. is there anything else i can do? Im about ready to take a hacksaw to the wall and replace all the pipe because i dont know what else to do.
please help!
Ryan
 
trap

They don't put gummy stickers on everything.

Especially on the spigot of street fittings and bushings. Audion man, it is trying to tell you something, namely do not use that trap. Find a way to use conventional fittings to get the trap to line up properly.
 
it wont work with a normal trap because the sink drain is too close to the wall. the only other way i can do it without the accordian trap is to go to the side and use a 45 or two 90's to get back to the wall, but they dont make those in 1 1/4" either so it still leaks from the last elbow to the 1 1/4" pipe coming out of the wall.
 
You must log in or register to reply here.

Similar threads

J
Sweat 1/8 nominal directly to 1/4 nominal
Replies
0
Views
179
JoshATX
J
Spta97
Replacing 2" Kitchen P-Trap with 1 1/2"
Replies
3
Views
4K
Reach4
Reach4
A
90 Degree Elbow 3" x 3" with 1 1/2" High Heel Inlet - impossible to find?!
Replies
3
Views
5K
John Gayewski
John Gayewski
R
1-3/4 to 1-1/4 pvc drain reducer
Replies
0
Views
697
RedBanker
R
T
Rough-plumbing for bathroom in basement, utilizing a Sewer Ejector Pump
Replies
1
Views
219
Jeff H Young
Jeff H Young
Back
Top