Tee PVC into Cast Iron Drain

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jmengel

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Putting in a new bathroom upstairs and are running a new 3" PVC stack down to meet with the main drain line in the basement. Rest of the house is hubbed cast iron. Have dug through the basement slab and am about to snap the 4" cast iron and T the PVC into the main waste line. My plan is to use a 4x4x3 PVC Wye and glue a few inches of 4" PVC into the 4" ends of the wye and use shielded hubless neoprene boots to connect the 4" PVC stubs to the cut ends of the 4" cast iron pipe. Is there a fitting designed for this or is this the best way to T a new PVC system into an old cast iron system? Seems like a kludge to me, there must be a better way.

Additionally, is it preferred to dig out an entire hubbed length of the cast iron or is it OK to just snap cut out a small (18") section and replace with a PVC T as described?

Thanks for your help!

-Jon
 

jmengel

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I am cutting into the horizontal run under the slab. Is a cast hubless Tee still preferred in this application?

-Jon
 

Terry

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Horizontal? You could go either way,
I like using the no-hub cast wyes though.
It's closer to the pipe size and looks a bit cleaner.
 

jmengel

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Thanks for all the tips everyone. This site has been an important resource for my whole plumbing project.

-Jon
 
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