Do these parts exist?

I'm about to replace the soil stack, from the toilet all the way to the ground. It's currently cast iron, and I'll be replacing it with ABS or PVC, most likely the latter due to availability.

The CI parts seem to be non-existent in PVC/ABS though, which means I'll have to redesign the layout - something I was hoping to avoid. Here's what I'm looking for...

The first is a 4" elbow which the closet flange sits on. This elbow has two, 2" wye fittings, one on either side. These enter the elbow on the horizontal part of it. (see attached Fitting1.jpg)

That elbow then immediately connects to a second elbow, which transistions downward, right into the top of the stack. This 4" elbow has a 2" fitting on the top side of it, to which the vent pipe is attached. (see attached Fitting2.jpg)

I've searched the web, hoping to find these parts in PVC or ABS, but so far I haven't located them. Does anyone know if they exist? If I have to, I can lay-out the pipes differently, but that will mean more work, and most likely the wall will have to wrap around a larger mess of pipes when I'm done.

Thanks
Jesse

The heel inlet elbow is common. Check Nibco.com or Charlottepipe.com.

I did not find the soil fitting. But if you are completely redoing all the cast iron, you shouldn't have too much trouble fitting together correctly with available fittings.

fittings

"Tapped closet bends" have been illegal for decades which is why you won't find them in any material, and it would not be a good idea to reconstruct one out of fittings either. Connect things the correct way.

Thanks Jimbo - Not knowing what term to search for was my problem. "heel inlet elbow" gave me all kinds of options.

Hopefully the inlet will line up fairly close to the existing vent. Both the vent pipe and stack are in fixed positions, though I may have about 2" of play on the stack's final position.

I realize that the soil fitting could be plumbed several different ways, but my concern is not creating a larger "wrap wall" to cover the pipe as it runs down the interior wall of the room. Would it be OK to simply use a double Y (4 x 2) fitting right below the heel inlet elbow? Would this change the effectiveness of the vent, having these inlets enter the system below the vent pipe?

Thanks again,
Jesse

hj said:

"Tapped closet bends" have been illegal for decades which is why you won't find them in any material, and it would not be a good idea to reconstruct one out of fittings either. Connect things the correct way.

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I wondered if that was the reason... thanks HJ.

Heel elbow use is limited. You may want to post your planned usage back here before doing anything.

Redwood said:

Heel elbow use is limited. You may want to post your planned usage back here before doing anything.

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Fair enough... I'd rather do it right the first time. My buddies have the opinion of "just get the pipes connected somehow", while I'm a bit leery with that attitude. I want the vent to do its job, and I don't want to be draining out the traps due to vacuum.

The heel elbow will have the inlet vertically oriented for the purpose of venting, as shown in the second picture above. This is currently how it's plumbed. Since I can't get, nor should I use (input from HJ), a street elbow with inlets, my thought was to connect the two ABS pipes shown in the first photo to the vertical part of the stack via a double wye. These connections would occur just below the vented heel inlet elbow, and would therefore be below the vent.

Does this sound kosher Redwood?

That would depend on how those 2 lines are vented.

Redwood said:

That would depend on how those 2 lines are vented.

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Neither one is vented. The one piece of ABS goes five feet to the tub drain/trap, and the other pipe runs less than four feet to the sink. Therefore, the single vent off the heel of that elbow is all that is there.

Dwv

That system was usually either installed by someone with lead DWV experience or it may have been a lead DWV replacement, because that was a common lead style of installation, normally using an "S" trap for the sink, or an "S" trap with a crown vent, which is also illegal these days.