Plumbers advice needed

[pelleeklund]

I'm trying to add a small powder room to my basement and had a couple questions before I start knocking down walls and re-arranging my entire tool storage area. I took a look at my vent stack and saw that it looks like it's set up to add a bathroom but wanted to see if any pro plumbers could confirm it. I'm not trying to tear into the foundation to add a line or get one of those gravity assist toilets. Any ideas would be appreciated. Here's a picture.

 

[deeda]

I come from a family of plumbers and have done some basic DWV work so take my opinion with a grain of salt.

The upper Wye is probably the clean out access for the main sewer line and the lower stub (looks like 2") may be for a slop sink set up.

I don't see any way to add a toilet unless you dig up the floor.

 

[bbortko]

I come from a family of plumbers and have done some basic DWV work so take my opinion with a grain of salt.

The upper Wye is probably the clean out access for the main sewer line and the lower stub (looks like 2") may be for a slop sink set up.

I don't see any way to add a toilet unless you dig up the floor.

I've seen it where the toilet is on a raised floor. Not the most aesthetic build but fully functional.

 

[johnny potatoes]

Is that a 3" pipe to the right? Looks like a can of spray paint. Anyway I would see if that is in fact a drain pipe, and you could use it for a toilet. 3" is not ideal but it looks like it probably ties into the 4" under the slab. 3" we'll work fine for liquid waste and small solids as long as it's not a long horizontal run to the 4". Most toilet traps are less than 3" so if it can get through the toilet and it's close to the 4" you should be good. Next question, is that a supply line in the pic? Or a stick of conduit?

 

[dmopar74]

The pipe sticking out of the concrete to the right could be used as a toilet drain, and the t in the stack for a sink. Big question is where is the vent for the toilet?

 

[dmopar74]

Is that a 3" pipe to the right? Looks like a can of spray paint. Anyway I would see if that is in fact a drain pipe, and you could use it for a toilet. 3" is not ideal but it looks like it probably ties into the 4" under the slab. 3" we'll work fine for liquid waste and small solids as long as it's not a long horizontal run to the 4". Most toilet traps are less than 3" so if it can get through the toilet and it's close to the 4" you should be good. Next question, is that a supply line in the pic? Or a stick of conduit?

Up to 3 toilets can run on 3" pipe per national plumbing code, millions of houses in USA are 3" all the way to the main sewer line in street

 

[johnny potatoes]

Up to 3 toilets can run on 3" pipe per national plumbing code, millions of houses in USA are 3" all the way to the main sewer line in street

Thanks for the info, I'm a commercial superintendent and I never see 3" waste lines. Still you'd think I knew that after this many years.

 

[dmopar74]

Was a journeyman residential plumber for 12 years till the market crashed. Did some commercial but never got my card.

I'm sure with the 4" so close to the toilet stub you could run a vent for the toilet off the 2" t before you tie in the sink drain. I could draw it out later if the op would like. How far from both walls is the toilet stub?

 

[deeda]

I missed that PVC stub on the floor to the right of the main stack due to the stack of cans.

 

[pelleeklund]

Sorry for the delay guys, I've been working on moving all of my stuff out of the room so I can have a clean place to work. I'll send a shot of the stack in a minute. That is the toilet drain, the part that looks like a spray can, my next pictures should help clarify the area. I'm obviously concerned with the layout, trying to situate the toilet and sink, plus all of the feeds and returns prior to putting in studs and dry walling. I'm laying tile on top of hardy backer before I cut any pipes, I want to make sure the flange rests at the finished floor level. I've heard about possibly raising the level of the toilet to help gravity a bit but I'd like to avoid that at all costs. I drink a good bit in my basement and I'm not trying to worry about my approach to the toilet. I'm sure I'll trip over it and end up kissing the porcelain.