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Old 01-19-2012, 02:18 PM   #1
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Replacing waste stack


I just bought a 1930's home and I need to make some upgrades, including replacing the plumbing. The waste stack is cast iron pipe that has cracked all the way through. It needs replaced from the slab up (and possible under). On the second floor, there is a bath. I want to add a second bath next to the existing one (and share a common wall for plumbing). I don't have a lot of $ to spend, so I want to add the second bath later. I also want to add a 1/2 on the first floor, but later.

Is it possible to add the second and half bath at a later date using the replaced waste stack? Anything that would make the later additions way more difficult than just adding them when the waste stack gets replaced? Thank you


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Old 01-19-2012, 02:29 PM   #2
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Add a T to the main stack where it will needed to be for the future bathroom.
This question is near impossible to answer without either seeing the house or looking at detailed architectural prints.


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Old 01-19-2012, 02:32 PM   #3
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Well if the upstairs bath is tying into same stack id go ahead and revent the main floor bath to a level higher than the future fixtures upstairs before tying them back into the new stack to save time/money later.
If you can rough in the waste/vent lines for upstairs bath when you install the new stack that would also help
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waste stack

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