Please Help an Old Army Guy-Vent Questions

I have read previous posts on this site that give me a partial answer regarding my stubbed out basement, but I want to ensure I am clear about a few things that are not clearly spelled out (at least to a novice like myself).

So from past posts I can safely assume that the pipe I have labeled "B" is the vent pipe, that pipe "A" is the drain for the shower/tub, and pipe "C" is for the toilet. Pipe A and C protrude about five inches above the basement floor, and pipe C protrudes about three feet above the floor and is in the middle of one of the stud cavities.

First question is related to pipe B; if that is the vent pipe do I need to extend it towards the ceiling and through the exterior wall or leave it as is (capped).
Second question might affect the answer to the first; I want to put in a sink which I have identified with dotted lines. Can I tie into the capped pipe and use it as a drain if I use a studor vent for the sink? If not, what should I do regarding a drain for the sink?
Third question is related to P traps; I know the toilet has an internal P trap and a P trap for a sink would be in the cabinet, but should pipe A have a P trap under the slab? Besides tearing up concrete how would I know?

Please help, thanks!

I'll help you out, even tho you are Army

Thanks for the reply Frodo and thanks for helping me out even though I am Army!

Right under my join date it should show "location: Athens, GA"

That is a good technique using a tape to see about the p trap and it definitely has one.

My main question is the venting, its too far from the main stack and if I drain the sink into the vent does that now mean I cannot use it as a vent. Do I have to extend it out and through the wall. I can use a studor for the sink, but I need an answer so the shower and toilet are getting vented.

measure it. from the ptrap to the vent upc is 5'

can you take a picture and post it?

I am thinking you have a vent for all 3, that is the lav

Frodo has it, hopefully, after measuring, the answer is yes, that vent can also be the sink drain. The vent will have to be uncapped and run through the roof of the home to the outside. The roof penetration should be minimum of 3 inch diameter to help prevent snow from clogging it and or birds, mice, bees building nests.
Sound like the trap was installed under the concrete for the shower-so all good there. Good luck!

reganwood said:

Thanks for the reply Frodo and thanks for helping me out even though I am Army!

Right under my join date it should show "location: Athens, GA"

That is a good technique using a tape to see about the p trap and it definitely has one.

My main question is the venting, its too far from the main stack and if I drain the sink into the vent does that now mean I cannot use it as a vent. Do I have to extend it out and through the wall. I can use a studor for the sink, but I need an answer so the shower and toilet are getting vented.

Click to expand...

thats OK Army,, Us Air Force guys are used to bailing you out LOL
just tell us the coordinates, we will deliver