Laundry & Sink Drain/Vent : Is this correct?

[Walter B]

I am building/insulating a basement wall and I need the drain/vent plumbing modified to build the wall. Currently it is using 1.5" ABS (and I am doubtful that it was done correctly). As seen in the picture it currently has 2" cast iron connecting to 1.5" drain & vent. I would like to cut off the cast iron hub and connect 2" via a no-hub fitting. Is my sketched wet-venting method up to code?

 

[Terry]

None of your drawing is right.

The washer trap arm needs a santee on the vertical, and a vent above it, not a waste line from above.

Santee, and then vent out of the top, with no waste coming down.

Vents go up, waste goes down.

 

[Sponsor]

 

[Reach4]

1. sink could be on left.
2. cleanout could be moved up above wye and below the 1-1/2 to 2 inch reducer.
3. red and orange vents join above 6 inches above standpipe and rim of sink ("flood levels"). Connection can be upside-down santee.

 

[Walter B]

Ok I think I understand. Is this better? Is the horizontal vent to be > 6" above the washer standpipe or the sink standpipe?

s this what you mean?

 

[Reach4]

That's what I meant, presuming the fittings containing horizontal to horizontal drainage are combos and not santees.
You could also feed the sink and standpipe into different santees on the vertical stuff if that suits your needs better.

As seen in the picture it currently has 2" cast iron connecting to 1.5" drain & vent. I would like to cut off the cast iron hub and connect 2" via a no-hub fitting.

That cast iron into the floor might have a 2 inch hub, and instead of a shielded coupling, how about a Fernco donut? Search for that in this forum, using the search box above.

 

[Walter B]

Is a combo the same as a "T"? Like this ?

It is indeed a 2" hub. I considered the Fernco donut but I thought it would be difficult to remove the hard material, Oakum or whatever it is.

For the 2" cast iron hub.

 

[Reach4]

It is indeed a 2" hub. I considered the Fernco donut but I thought it would be difficult to remove the hard material, Oakum or whatever it is.

Top layer is lead. Below that is the oakum. Seems easy enough to me although I have never done it. I would get some long drill bits so that the drilling is more straight down. A drill extension might be as good as long bits.

I would work on drilling out the easiest to reach part, and pry the lead with the old screwdriver. At some point you can rock the pipe to help. You can do a lot of drilling of lead, which is fairly soft, in 10 minutes. Vacuum up the chips.

1/4 and 3/8 seem like good bit diameters.

 

[Walter B]

Ok great, I'll try it if I can get my hands on one. Is my last diagram acceptable?

 

[Walter B]

Ok thanks all! Any other input is welcome also.

 

[Terry]

Any reventing going horizontal is 42" or higher above the floor.
You have a 2" cast iron hub that will take 2" pipe. A regular drill bit and flat blade screwdriver will get the lead out.
A fernco donut allows you to tap in a 2" pipe after some liquid soap for lubrication and beveling the end of the pipe.

 

[Walter B]

Gotcha, excellent thanks!

 

[Walter B]

Reach4, I think I just clued into what you meant by "combo".

That's what I meant, presuming the fittings containing horizontal to horizontal drainage are combos and not santees.

It must mean a Wye connected to a elbow. I don't see any fittings that combine them at Home Depot, but that makes sence that any draining onto a horizontal would need a smoother flow than a santee would provide.

 

[Reach4]

It must mean a Wye connected to a elbow

A combination of wye connected to a 45.

They go by different names. I did not find it on https://www.homedepot.ca/ but it may be under a different name. This is the US HD site.
https://www.homedepot.com/p/NIBCO-2-in-PVC-DWV-All-Hub-Long-Radius-Sanitary-Tee-C4812LHD2/100345170

 

[Walter B]

Ok thanks, I think I have the terminology down now. I was also thinking that a santee was different than a tee now I realize they are the same.

 

[Reach4]

Ok thanks, I think I have the terminology down now. I was also thinking that a santee was different than a tee now I realize they are the same.

That name that HD gave that fitting is unusual IMO. Page 3 lower right of https://www.co.lincoln.or.us/sites/..._-_helpful_hints_residential_construction.pdf is a more common description.

Don't worry about black ABS vs white PVC for this purpose.

 

[Walter B]

Thanks, that pdf a good resource.

Don't worry about black ABS vs white PVC for this purpose.

Understood.

 

[Walter B]

I made a mistake: what I thought was a drain is a vent and vice vera. Now the existing seems logical except for the Wye in the drainpipe.

So back to the drawing board kinda. Are there any flaws apparent in this sketch?

 

[Plumber01]

Just change the tees on your laundry and sink vents to combos.

Everything else looks good.

 

[Walter B]

Ok I wasn't sure about that, thanks.

 

[Reach4]

Now the existing seems logical except for the Wye in the drainpipe.

Wye in the drainpipe is totally logical too. Why do you suspect it is not?

Here is an alternate below. Also, maybe another cleanout in the drain line from above.