Any 2 in. x 2 in. x 1-1/4 in. x 1-1/4 in. Double Fixture Tee?

[Jian]

Is there such double fixture tee with 1-1/4 inch on the side? I want to use a double fixture tee to convert single vanity to double vanity. But the stud width is narrow and only allow 1-1/4inch PVC pipe to penetrate through without disrupting the stud integrity. Obviously the 1-1/4inch will then be used as horizontal line for the individual vanity drain line.



Another alternative is 2 in. x 2 in. x 1-1/4 in. x 1-1/4 in. double wye tee.

 

[Terry]

They do make a 2 x 1.5 x 1.5 x 1.5 double fixture fitting for that.
The double wye is not the right fitting if you expect it to work for two lavs. I don't know of any 1.25" pipe and fittings for DWV.
You used to see that with galvanized and copper though.

 

[Sponsor]

 

[Jian]

They do make a 2 x 1.5 x 1.5 x 1.5 double fixture fitting for that.
The double wye is not the right fitting if you expect it to work for two lavs. I don't know of any 1.25" pipe and fittings for DWV.
You used to see that with galvanized and copper though.

Terry, thanks for the quick reply. I also found that double wye tee will not be good for lavs due to venting issues.

I searched everywhere possible on the web and could not find any double fixture tee with 1-1/4'' side for DPV either. Just want to confirm this with everyone on the forum since you all are more experienced.

 

[Reach4]

How about a 2" x 2" x 1-1/2" x 1-1/2" PVC DWV Double Fixture Fitting with a pair of
1-1/2" x 1-1/4" PVC Sch. 40 Spigot x Socket Bushings?

 

[Jian]

How about a 2" x 2" x 1-1/2" x 1-1/2" PVC DWV Double Fixture Fitting with a pair of
1-1/2" x 1-1/4" PVC Sch. 40 Spigot x Socket Bushings?

Good thinking! I guess I can also use a bushing reducer. Lowe's has this 1-1/2-in x 1-1/4-in dia x 2-in L Bushing Bushing PVC Fitting (https://www.lowes.com/pd/LASCO-1-1-...-x-2-in-L-Bushing-Bushing-PVC-Fitting/3371596).

 

[wwhitney]

Why do you want 1-1/4" side inlets? Are DWV 1-1/4" PVC fittings available?

I think standard practice would be to use 1-1/2" solvent weld pipe/fittings to a 1-1/4" trap adapter.

Cheers, Wayne

 

[Jian]

Why do you want 1-1/4" side inlets? Are DWV 1-1/4" PVC fittings available?

I think standard practice would be to use 1-1/2" solvent weld pipe/fittings to a 1-1/4" trap adapter.

Cheers, Wayne

My stud width is not the standard 3-1/2'' instead it is only 2-3/4''. I did some calculation that for a non-bearing wall the max hole that can be drilled through is 60%, which will be 1.65''. For this size, the 1-1/2'' PVC won't be able to penetrate through without disrupting the integrity. Instead, the 1-1/4inch PVC will be able to go through the studs.

Another option would be 1-1/2'' copper pipe. Then the problem will be how to connect 1-1/2'' copper to 1-1/2'' PVC. I am not sure if there is any coupling can do that. Maybe the 1-1/2" x 1-1/4" rubber flexible PVC coupling can do the job since the ODs of 1-1/4'' PVC and 1-1/2'' copper are quite close.

 

[wwhitney]

For joining 1-1/2" Cu DWV to 1-1/2" PVC Schedule 40: https://www.fernco.com/dimensional-drawings/3001-150

If you try to use 1-1/4" PVC through the studs, can you get a medium turn or long turn 90 to turn out of the wall with appropriate sweep? How many studs are we talking about?

Have you considered running two drains/vents in separate stud bays and combining the drains in the floor framing and the vents in the ceiling framing? Presumably you'd have more room in the floor/ceiling than in your (old) 2x3 wall.

Cheers, Wayne

 

[Reach4]

Good thinking! I guess I can also use a bushing reducer. Lowe's has this 1-1/2-in x 1-1/4-in dia x 2-in L Bushing Bushing PVC Fitting (https://www.lowes.com/pd/LASCO-1-1-...-x-2-in-L-Bushing-Bushing-PVC-Fitting/3371596).

I don't think 2 inches long helps. A flush bushing is going to be a better choice. Charlotte 107 looks good if you can find it. I don't know if that is any shorter than this one:
https://www.supplyhouse.com/Spears-437-212-1-1-2-x-1-1-4-PVC-Schedule-40-Spigot-x-Socket-Bushing

For joining 1-1/2" Cu DWV to 1-1/2" PVC Schedule 40: https://www.fernco.com/dimensional-drawings/3001-150

If you try to use 1-1/4" PVC through the studs, can you get a medium turn or long turn 90 to turn out of the wall with appropriate sweep? How many studs are we talking about?

Yeah copper would be smaller. Maybe even go with 1-1/4 copper if you can find the other stuff you would need.

 

[Jeff H Young]

technicaly the copper is 1.625 leaving you 1/32" for slop in hole thats very tight drilling

 

[Jian]

For joining 1-1/2" Cu DWV to 1-1/2" PVC Schedule 40: https://www.fernco.com/dimensional-drawings/3001-150

If you try to use 1-1/4" PVC through the studs, can you get a medium turn or long turn 90 to turn out of the wall with appropriate sweep? How many studs are we talking about?

Have you considered running two drains/vents in separate stud bays and combining the drains in the floor framing and the vents in the ceiling framing? Presumably you'd have more room in the floor/ceiling than in your (old) 2x3 wall.

Cheers, Wayne

Wayne, thanks for sharing the fernco coupling. This will work.

The current stud layout is quite complex and the space is also very right. My plan is to at least use the existing vent line. After reading everyone's suggestions, currently I have two plans below. I personally prefer the first plan since the plumbing will be simpler. The second plan is also great since the risk of leaking is low.

First plan is to use a double fixture tee and replace the central 1-1/4'' copper drain with 2'' PVC. In this case, I will need penetrate one stud to the left for the left lav, and one single stud and two double studs to the right for the right lav using the 1-1/2'' copper drain line.

The second plan is to leave the current lav as the left lav and add a right lav. In this case, I will only need penetrate to the studs on the right connect new vent line to the central vent, and add a separate drain line on the right under subfloor. Note that there is a radiator line on the left subfloor.

 

[Jian]

technicaly the copper is 1.625 leaving you 1/32" for slop in hole thats very tight drilling

Yeah, it is very tight. At least theoretically it will work.

 

[Jian]

I don't think 2 inches long helps. A flush bushing is going to be a better choice. Charlotte 107 looks good if you can find it. I don't know if that is any shorter than this one:
https://www.supplyhouse.com/Spears-437-212-1-1-2-x-1-1-4-PVC-Schedule-40-Spigot-x-Socket-Bushing

Yeah copper would be smaller. Maybe even go with 1-1/4 copper if you can find the other stuff you would need.

Is this the Charlotte flush bushing you are referring to? I was able to find one on ebay (https://www.ebay.com/itm/Charlotte-...2in-x-1-1-4in-PVC-Flush-Bushing-/233350421460) and this size is also listed on Charlottee's product catalog.

 

[Reach4]

1.25 inch copper is 1.375 OD. I don't mean to imply that would be usable with readily available fittings. I don't know.
1.25 PVC is 1.66 OD.

Yes, that is the Charlotte bushing I was referring to. I don't know how that compares to the SupplyHouse bushing.

 

[Jian]

1.25 inch copper is 1.375 OD. I don't mean to imply that would be usable with readily available fittings. I don't know.
1.25 PVC is 1.66 OD.

Yes, that is the Charlotte bushing I was referring to. I don't know how that compares to the SupplyHouse bushing.

1-1/4'' copper actually will give more room to wiggling over the stud hole size. Fortunately Fernco also supplies 1-1/2'' PVC to 1-1/4'' copper coupling rubber connector (https://www.fernco.com/dimensional-drawings/3001-1125). Worst scenario is that 1-1/4'' copper can be for the venting line.

Now I just need to weigh either using all PVC fittings like the scheme below or using mixture of copper and PVC fittings.

 

[Reach4]

Now I just need to weigh either using all PVC fittings like the scheme below or using mixture of copper and PVC fittings.

https://www.homedepot.com/p/Everbil...int-Trap-Adapter-Fitting-C9017114HD/204620211
https://www.supplyhouse.com/Elkhart-46110-1-1-4-Copper-DWV-Sweat-Trap-Adapter-C-x-Slip-Joint


https://www.homedepot.com/p/The-Plu...ree-Elbow-Fitting-5-Pack-0114CLTS-5/310836562 is five of them...
https://www.supplyhouse.com/Elkhart-31838-1-1-4-FTG-x-Copper-90-Long-Turn-Street-Elbow is quantity one, and I think would connect a pipe to the trap adapter.


https://www.supplyhouse.com/Elkhart-30354-1-1-4-Copper-x-Male-Adapter would put an NTP thread on a copper pipe, as an alternative to the shielded coupler.
https://www.supplyhouse.com/Spears-438-212-1-1-2-x-1-1-4-PVC-Schedule-40-Spigot-x-Female-Bushing would go into the double fixture fitting.

 

[Jeff H Young]

Id plan on a 1 3/4inch hole or reduce to 1 1/4 dirty arm with 1 1/2 hole

 

[Jian]

https://www.homedepot.com/p/Everbil...int-Trap-Adapter-Fitting-C9017114HD/204620211
https://www.supplyhouse.com/Elkhart-46110-1-1-4-Copper-DWV-Sweat-Trap-Adapter-C-x-Slip-Joint


https://www.homedepot.com/p/The-Plu...ree-Elbow-Fitting-5-Pack-0114CLTS-5/310836562 is five of them...
https://www.supplyhouse.com/Elkhart-31838-1-1-4-FTG-x-Copper-90-Long-Turn-Street-Elbow is quantity one, and I think would connect a pipe to the trap adapter.


https://www.supplyhouse.com/Elkhart-30354-1-1-4-Copper-x-Male-Adapter would put an NTP thread on a copper pipe, as an alternative to the shielded coupler.
https://www.supplyhouse.com/Spears-438-212-1-1-2-x-1-1-4-PVC-Schedule-40-Spigot-x-Female-Bushing would go into the double fixture fitting.

Is threaded fitting legitimate for waste line? Do you need apply teflon tape when connecting?

 

[Reach4]

Is threaded fitting legitimate for waste line? Do you need apply teflon tape when connecting?

Yes. I would use PTFE tape and plastic-safe pipe dope both. Some put dope over the tape. I put dope, tape, dope.

Overkill, probably.

 

[wwhitney]

No stud holes option: lift up floor boards, penetrate the bottom plate in two separate stud bays for the two separate drains, join them horizontal in the floor joists. Similarly for the vents/top plates/ceiling joists. Your horizontal drain looks pretty high in the joist bay, and holes in the joists have to be at least 2" clear from the top of joist, so this may not be possible.

Maximum copper (requires soldering) option: PVC 2x2x1-1/2x1-1/2 double fixture tee, short 1-1/2" pipe segment, 1-1/2" PVC x 1-1/4" Cu DWV Fernco, bore through studs with 1-1/2" hole, DWV 1-1/4" Cu elbow, 1-1/4" copper trap adapter.

https://www.homedepot.com/p/Everbil...e-Cup-x-Cup-Elbow-Fitting-C907HD114/100201834

Minimum copper (no soldering): same as above through the studs, then another 1-1/2" PVC x 1-1/4" Cu DWV Fernco, with a 1-1/2" x 1-1/4" PVC bushing glued on 1-1/4" PVC pipe, a 1-1/4" PVC DWV elbow, 1-1/4" PVC trap adapter

https://www.menards.com/main/plumbi...-degree-elbow-dwv/k055250/p-1444449184942.htm

Cheers, Wayne