Found a disaster of a plumbing issue in crawl space. First photo show where I have macro cut the offending pieces out. From left horizontal is a 2" coming from shower. Middle vertical is 3" vent stack with only vent above through roof. Right vertical is 3" from toilet just above. As shower and toilet need to vent here, and you would not believe the mess the previous installer did, will this work with the two San-T as shown. These are not glued and heights will be changed, just loose fit to show basically what I have in mind.

Way back by bright light is the 4" waste line downstream that will connect to this via a wye. I expect that I will long sweep the bottom San-T and connect other side of block wall to the 4". Any issues with this?

Thanks

 

What flows down the 3" stack if anything?

Where is the bathroom sink line?

Tell me this and I can guide you further...

 

Hi Mike and thanks for the reply.

The 3" in the middle is the vent stack and nothing but vent above, straight to roof. The 3" to right is toilet about 12" above. The 2" from left is the shower from trap just out of sight. Shower trap to be replaced as I will redo anything I can, based on suspect of work that was done.

You ask about sink, and yes it is behind camera, and no problem to tie in. Also behind camera upstream is 1/2 bath, 1 toilet and 1 sink, also no issues to tie in.

I'm open to what to use in this situation as I have not yet glued in anything. For example, where I show a loose dry fit 3" San-T for toilet, would a vertical wye be better? Or, can I joint the shower to vent stack and own to 4" waste, and bring toilet in just upstream with a combination? Not sure if that serves as a proper vent for toilet, but would allow more options for a cleanout there.

Thanks again !!

 

The sink for that bath needs to tie into the toiler line going to the stack.

The shower in that bath then gets tied into the sink line.

The powder room bath is a seperate group but again the sink ties into the toilet of powder room then the 3" line to the stack... Possibly the other baths toilet line if theres enough pitch...

Other line from crawl just ties into the stack...

 

If you can invision this for one bath group you will understand how to simplify it...

Toilet goes to stack
Sink ties into toilet line. 3x3x2 y
tub ties to sink line 2x2x2 or 2x2x1 1/2

 

Hi Mike

This is unfortunately not new construction, this was done for my folks about 4-5 years ago and was a disaster when I went down to look at the DWV in crawl space. Sinks are tied into stack above ceiling, no way to open up tiled walls and change anything there. I did confirm this via pictures my folks have, and visually in attic.

What I have is what you see in photo. Neither shower nor that toilet are vented as you see there. The main 3" vent stack (center PVC) is close by. Perhaps I should show a picture of what it looked like down there prior to me cutting it out.

Basically, is what I showed (not glued, just dry fit) going to work? The 4" waste runs through almost directly below stack. Toilet just to the right as you see in photo, and show from the left side. As I cut out all the offending stuff, to include the 4" below, I can connect virtually anyway I like, given I have enough room.

I'm not sure if a San-T is my best option to connect to stack for toilet, but think it's fine for shower. Would a wye be better for toilet for flow and directionality?

Again, this is a finished bath where the problems are mostly down below, no options above where you see in photos.

Thanks again for the advice and time, and look forward to your reply.

 

Hopefully photos posts? Note that this is from opposite side of the crawl space as other two previous photos.

Mike, here is what I found when I went down there, actually on another mission then saw this. It was a hell of a mess. Toilet at the bottom of the wild "U" turn crap was not connected. Looks like he cut the horizontal too short, combined with not probably holding until PVC cement held. Not sure. Additionally, the connection from shower, via a San-T on its back, was loose, but not yet leaking. To add insult to injury, the vent (closest "U") and toilet "U" right behind were "attempted" to be connected via combinations. Both were slightly negative slope, and as mentioned the toilet connection was loose leaving about 3/16 gap that had been leaking for years. That is where I am now, fixing this mess.

 

Yes I know the sinks are vented.. But you need to pipe as I show with that pipe scheme in the crawl..

My pic only depics looking down through the floor..

Again toilet to 3" stack
Near the toilet ell gets a 3x3x2 Y that the sink will be tied into.
Then that sink line to the Y gets a 2x2x2 or 2x2x 1 1/2 y installed and the tub goes into thats sink arm.

So in this pic you will only have that one 3" Y for that bath group...





And thats why I am telling you to pipe as I state above...

 

And what is this???
Where does this come from?

I need better pics or a diagram....


[ATTACH=CONFIG]63901[/ATTACH]

 

Mike,

The newest picture is as I explained in the post the exact 180 degree opposite side of earlier photos. That is what I cut out to leave the three pieces of PVC you see in first two photos. Just why I'm doing what I'm doing here.

 

Mike,

Hopefully this helps clarify. I'm only asking for suggestions on main bath shower and toilet connections to main vent stack/horizontal main waste line. Other toilet and both sinks are no issue at all. Given my limited vertical drop, pictures 1 and 2, what is best way to connect shower and toilet?

Thanks !!

 

Does this help? One bath in green and one in read to show clarity,

 

Hi Mike,

I think I follow that. What you show for the half bath is what I planned.

Not at all sure I have room to do the main sink to toilet with proper slope and still have enough drop to connect to the main waste line via the vent and definitely no way to get a cleanout there then?

I hoped to just cover the main toilet and shower, then uphill, where I have the room, catch both sinks and half bath toilet. The half bath toilet is vented via a 2" inline with toilet that is dropped to crawl space, so it is vented just below toilet and both sinks are vented, so it really should not matter where they connect after that, right? The main toilet though, and shower are not vented, which is why I want to work them together, with limited vertical room, and close horizontal separation.

Hope that makes sense?

 

Your missing my point here.. Lets be very clear..

The way I show is how it must be done to have the plumbing properly vented.


Looks like you have plenty of room... I dont see the sink line but I am sure it is at the height of the toilet ell.



Not following you.. Draw me a picture with lines like I did..

But as I stated the way I show is really the only way from what I know about plumbing... ( Im a plumber 33 years)

 

Hi Mike and thanks for sticking with this.

Below are two additional drawings that I hope will help. First shows the vent situation at grade and above. Second is a 3D of below grade showing what drops into crawl. You will see the 2" dry vent directly behind the half bath toilet that connects to toilet there, prior to getting to main 4" PVC waste line.

So that area is OK, and I will make changes there, but nothing I can't figure out.

Problem area for me is main bath toilet and shower. Close orientation to each other and main vent stack.

 

The 2" vent drops you show in blue should not drop to the crawl. And in your 3d you only show one.

Your vents that should be in the crawl are the sink drains. This are combination sink drains and vents...

Basically like this.. ( If you have a 2" vent to the crawl and the sink is not vented as shown here like the dry vent then you have other piping challenges)

Reference only...

 

And if you do have a seperate vent 2" coming into the crawl it would still get piped as I show..

Here is another example.. But what you would do is tie that vent you say comes into the crawl somewhere into the sink arm. Like the area where is says 1.5" drain here..

[ATTACH=CONFIG]63925[/ATTACH]

 

Hi Mike,

Yes sink in half bath crosses at about 48" to behind half bath toilet (similar to your diagram above) and goes up to attic and across to 3" vent stack. The sink also obviously drops to crawl, but so does the 2" behind toilet. Not sure why that was done, but I expect that sink is vented fine, and I have room to do what I want in crawl. I will simply connect the sink to toilet arm in half bath, and bring the 2" vent too. It's there, so have to do something with it.

On main bath, sink to drops to crawl, and goes up and across to join vent stack.

Main toilet, as it stands since I cut off the mess there is simply a drop to crawl. Also I cut the main vent stack in crawl. And shower arm simply comes across from trap, toward the toilet and main vent stack. I can change direction of the shower arm to go where I need, as I will replace its trap with a cleanout trap. So my challenge remains just the connection of the main toilet, shower and main vent stack. Should I connect them vertically to vent stack? Or some other way?

By the way, one of my issues in crawl is a major support beam where all but the main toilet and shower are on other side of beam. This means to get below it for half bath and main sink , as there is no way above, I loose too much vertical to get across to the shower, main toilet or main vent stack. That is why I'm trying to keep these as if two separate bathrooms.

 

Mike,

Lets say this was a hypothetical situation, where only what is shown in photo exists No sinks and no other toilets, is there anyway to connect this to main waste line?