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Thanks for the reply CT-18 unfortunately all i have to play with is the 2" drain line comming out of wall. The rest (3" main stack) is behind a poured concrete wall 12" thick ! Is there any other way or idea to attach a sink and washer to the 2" drain line without breaking a wall to get...

Would something like this work ?

I have a 1970 home that uses a wet vent plumbing system. I have a main stack ABS 3" pipe that goes straight through the flat roof. There is a room in my basement that has a 2" abs drain that is connected straight to main stack 3" abs about not even 1 foot away. So no vent near this pipe...

I was wondering can i connect a sink to a vent pipe ? The vent pipe ends and its the last stop before it hits the main wet vent pipe thats 3 '' Any ideas ? Thanks in advance !!

Thank You sooooooo much for your time and help Daniel !! Well i guess thats what i will be doing this weekend !! Off with the 1 1/2'' and in with the 2''

Since i can't lower the height i will go with option 1. Thanks alot Pioneer Plumber , you saved me alot of headaches !! As promissed here are the pics of the main connection. Can you just verify for me this part, this is my main stack and where i connected the 1 1/2'' tube that i want to...

Ok, so from what i see, i can't lower the main horizontal trunk line, but what i can do is turn it into a 2'' line as it presently ties into a 3'' wet vent main stack with a 1 1/2'' bushing to 3'' wye. I can get a pic of that later as i would need to change all of that to accomodate the 2''...

Thanks for the help guys.....Great doodle work :-) Makes more sense now that i have a visual. On the doodle the sink is still below the washer...my main problem is height for the sink, will this work as per doodle ? So i should double vent...1 for each fixture sink and washer ? Should i use...

Ok so here is the story, the wife wanted a sink next to the washer. So i did a rough-in and she ran the washer and once i got a little water backup (about 1 cup) into the sink drain. Is this done correctly or what would you guys change? I know it should be a 2'' abs tube but its a 1...

Thanks again John , you save me alot of headaches !!!

Thanks again John you were very helpful . I will run it like this....

So John should i just put in a tee in between the trap and Y and run a 1 1/2'' abs to basement ceiling and install a Studor ? Running it up to roof is next to impossible. What if i just run a abs tube between trap and Y and reconnect to top of main stack in the basement would that work...

Ok so ...update I have just realized i have a wet vent. The new location of the washer drain would be 14 ft away from the main wet vent soil stack. How should i vent the new washer drain pipe ? Thanks !

Thanks for the advice John. Now should i cut in a wYe or a sanitary tee ? Also since the main vertical 3'' ABS pipe won't give to much i can only glue 1 side so should i use a Fernco flexible coupling on the other side ? Thanks again !!

Hi Guys.... The wife and i decided we would like to move our washer downstairs in the basement. We would like to move it to the left of the main drain stack. The problem i am having is i am not to sure how to connect the drain & vent. I wanted to tap into existing cleanout but its a 3.5''...