ABS DWV and a PVC shower drain?

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NMPastor

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Greetings.

I am taking out a small shower base, and going back with a larger tiled shower.

The DWV system appears to me to be ABS, but the majority of shower drains appear to be PVC. I've always thought that a PVC/ABS connection was a no-no.

Is there some way to make that work?

Thanks.
 

Terry

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Shower drains also come in ABS.
I can choose whether I'm working with PVC or ABS at my supply house.
You have have to mix the two, I use a coupling like this.

mission_bandseal.jpg
 

NMPastor

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Thanks. Looks like a stainless-reinforced Fernco.

I've found the Sioux Chief website, which seems to have everything in both PVC and ABS.

Thoughts on a linear drain versus central drain?

Also, thoughts on a paint-on seal (e.g., Red Guard) versus membrane (Noble)?

I know that you don't do tile work, but you've seen a lot of it go bad.
 

Jadnashua

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A linear drain can give you some more options, and potentially a single slope, which you may find easier to construct, but be prepared for a significant price increase. If that doesn't impact you, it's a nice option. A tiled grate verses one with metal showing is your least cost option unless you're using some really exotic, expensive tile.

Noble makes some nice products, but they are quite thick which requires some careful detailing work so that the membrane does not end up with a big buildup, especially in the corners. Also, it requires a fairly expensive sealant for the seams. It work, and can work well. I prefer other membranes.

I do prefer a sheet membrane verses a liquid. The liquid must be applied within some very specific thicknesses in multiple layers without drips, runs, or pinholes. I think it's more reliable to do it with a sheet, especially if you haven't done it regularly. Either can work.

I get my hardware info here, and tiling at www.johnbridge.com.
 

NMPastor

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Thanks.

Yeah, the linear drain is hundreds, as opposed to $50 for a really good central drain.
 
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