Would this work as a drain/vent? The 2" main drain and the 1 1/2" vent is 90 degrees of the wye and it will head up through the bottom plate with elbows.

It is a bit difficult to get a 3D view with 2D but I think the vent should be high up where the 90 elbow is. Replace the elbow with a Tee.

Why Bob? Granted it would have been easier (and a lot cheaper) to make the trap look at the vent, used a Tee and a 45 ell. But its done now and I don't see why it wouldn't work OK.

Its not glued yet, just dry fit. Where would you put the tee?

Harold you could be right, I just don't like the looks of a vent below the lateral drain line. It will probably work out but if its not glued yet why not use my idea.

John, I am thinking or replacing the elbow just above the wye with a Tee. However, lets keep the discussion going for a bit because Harold has some good stuff too. Where is your vent going once it goes through that perimeter board, open air?

Up through the exterior wall into the attic to connect to the other vents. You can see the 1.5 inch elbow, there will be another elbow to to turn it up and go through the floor

Put a tee with a bushing on the vent pipe, put a short piece of pipe in the side opening and point it toward the trap. Put the short piece of pipe in the trap and point it toward the tee. Measure the distance between the trap and the tee. Cut pipe to proper length. Pull the tee down, glue the pipe in the trap and the tee on the other end and to the vent pipe. Put glue on the 45 ell, put in drain and then push up into bottom of tee.

How about this for the shower drain? 2" trap with 1.5" vent off the 90 elbow.

Looks better to me with my only question being why a quick 90 elbow right at the end of the trap. You used a slow sweep for the next elbow and I think both should be slow sweeps. What do you think Harold?

Hi Guys...

John... if still dry fit... remove the dandy cleanout (you have plenty of cleanouts.. ;) ) and the long sweep 90 closest to the trap.

Now install a street 45 degree fitting out the run of the vent tee and install into the 2" ptrap. Then run that 1.5" vent as planned. LOOKS GREAT!

Mark

When I bought the trap it came all together as one... figured I'd use it the way it came. I just want to make sure my shower will drain. Massplumber which photo are you referring to in your last post? The newest setup I came up with has the 2" cleanout up along the floor joist... If that is the one are you saying put the 45 street elbow coming out of the tight 90 elbow and then offset the 90 sweep so it's a direct run right into it? Of course leaving the vent in that same area?

Hey John:

As long as not glued... yes, I was referring to the cleanout up along the joists...

Remove that cleanout after the vent tee (DON'T NEED IT) and that long sweep 90 going into the trap... then install a street 45 right into the vent tee facing toward the trap... then offset the trap to align and fit together (eliminates the cleanout and that long sweep 90).

"When I bought the trap it came all together as one...figured i'd use it the way it came"... what does this mean.. The trap came in two pieces.. right.. It must have.. or it was glued by someone and then returned..?

Anyway, if can't make the single 45 work as I am suggesting, glue it all up exactly as it is... you did great job... Mark

PS --->> You will need to teflon tape AND generously pipe dope every single one of those cleanout caps... ok?

Thanks massplumber... worked out great. I already have the other stack nearly complete and looks pretty good. I how do you reduce 2" to 1.5 drains where it stubs out of the wall...i.e. use a glued reducing bushing or a threaded fitting which I have seen done? Also i have a 4x4x2" tee in my lower stack for a 2" laundry hookup, if that 2" drain with trap is close to the stack do I need to vent it?

Hey John:

Glad it is working out.

In terms of stubbing out of wall use a 2"x1.5" sanitary tee... or could just use 2" sanitary tee and cement a 2" x 1.5" reducing bushing into the branch...I don't recommend the threaded bushings.

If anything connects ABOVE the 4"x4'x2" tee at lower stack for a 2" laundry hookup.. then, c'mon.. you know I am going to say it.. ;)... Then you need to add an 1.5 inch vent and connect properly!!

The washing machine drain has a 30-36 " tailpiece coming out of the trap... jusy FYI!

Talk soon.

All right got it... thanks once again. And I'm sure we'll talk soon.