what does replacing a waste pipe entail?

hi all — Our 110 year old waste pipe has a crack in it. The crack is in our cellar. Before I start calling plumbers and contractors to fix it, I’d love to know what the process of replacing the pipe entails – how long does it take, ballpark of how much it will cost, do we need to replace the whole thing (cellar, first floor and second floor), or can we just replace the piece in the basement for now? Thanks for any

kms_bkyn

in Plumbing 6 years ago

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Guest User | 6 years ago

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Welding can be done.

cate | 6 years ago

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We had a cracked waste pipe in the cellar 10 years ago, fixed it then for about $1,000 as no-permitz estimates — the plumbers cut out the cracked part — stretched about half the width of the house — and never had another problem with any of the waste pipes throughout the house.

daveinbedstuy | 6 years ago

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If it’s just a crack, it can be patched. “Marine weld,” “Water Weld” and a few brands of wraps that all work. Otherwise, any section of any pipe can be cut out and replaced.

stevecym | 6 years ago

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i took care of an older building once some years ago and what we found was that if one section of pipe went, soon enough another nearby section would go. you also mention that this is cracked and I am wondering if something brought that on. either way, if a plumber suggests changing a few sections, do it. I have a damaged pipe (not waste but steam) in my own house and being a contractor and knowing the risks, I took a welder and plug welded the hole in it; this kind of repair would never pass muster with a pro in a customer’s house and I know if I had consulted a plumber he would have said replace the entire run back to the boiler; it is the correct way to do things and once they are on the job a couple more 8′ sections of pipe are not going to triple the price.

you ask about the riser. I am not a plumber, but I am going to guess that it will not have to be replaced. just the horizontal sections.

let’s wait and see what some other homeowners or better yet a pro says.

yudashasom | 6 years ago

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I should add, once they start working on a section, assuming it’s hub pipe – there’s a good change the stack will shift or crack. So be prepared for the worst.

There’s too many variables to give a good ballpark. Replacing a section in the cellar, maybe $1,000. If the whole stack needs to be replaced, $20k minimum with the finish work involved.

yudashasom | 6 years ago

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See if you can get away with replacing just the broken section. Replacing the whole stack would be a massive project. Many walls, ceilings and possibly bathroom tile will need to be opened up.