Hi,
I would like to put a sink in the basement. I took out the plumbed in bathroom (done by the previous owner) which was tied into the drain at the terminal end of the vent stack which consisted of a toilet along with a sink and a shower running off the same drain (in that order); the sink was vented with a free standing 2' x 1 1/2 " pipe which was capped by a chrome device, venting right into the basement (is this a cheater vent?)

Can I drain the sink back into the ABS drain that was put in, since it is already coupled into the ceramic drain that emerges from the terminal end of the vent stack? How can I vent the sink without cutting into the cast iron vent stack at the basement level? Can I go up to the ceiling of the first floor where the second floor bathroom sink ties into the cast iron stack? Or can I go out the basement wall and vent it there with a cheater vent? The kitchen sink doesn't seem to have a vent, is this because it is a double sink?

The vent stack is at the back of the house and the sink I would like to install is 12' away from this

There is another ceramic drain (5" O.D.) that runs at about a 30 degree angle from the vent stack but heads out the back of the house through the foundation wall. This pipe slopes toward the front of the house, a floor drain branches into this immediately followed by a p-trap, it then continues on to the next floor drain (I think- I haven't followed it beyond the first floor drain which I encountered- by the angle and direction that it is heading in) What is this drain?
Is the drain from the latter mentioned pipe the main drain or is it the one leading from the vent stack? Or will I find later on that they both tie into each other as they head toward the front of the house?

What is the relevance of a wet and a dry stack?
And what or how can you tell the difference?

I know I ask a lot.
Cheers Wendy

Wendy,
We really got to get together on terms. The "terminal end" of a vent stack is the piece that sticks out of the roof and what in the world is a "ceramic drain"? Would you be referring to a plastic pipe?
What ABS drain are you referring to when you speak of connecting the sink?

What is the relevance of a wet and a dry stack?
And what or how can you tell the difference?
A wet stack has fixtures discharging into it and is called a "Stack vent" while this same stack vent becomes a dry stack above the point of the highest fixture and is then called a "vent stack".
Wendy, If you're going to do the work yourself my advice would be to call in a sharp plumber for guidance and once \he gets you started we can walk you through the rest of the installation. Good luck and let us know. Tom

Tom,
Thanks for the terminology. By Ceramic I mean clay, I am Scottish so some of the terms or descriptions I use can be quite different or made up.
I am very capable of doing the work and I will find the right way to do it.
The ABS I referred to is a 4" drain that is coupled into the clay drain, which I exposed when I busted open the basement floor, it used to have toilet, shower and sink plumbed into it, but now I would like to redirect the drain to plumb in 2 sink actually, one in the basement and I'd like to move the main floor kitch.en sink to about the same location as the basement one so I was going to tie them in together.
I'm in no rush so I will keep you posted.
Cheers
Wendy

When you're ready todo the work make a drawing with measurements and we can help you do the job. Til then! Tom