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Question DetailsAsked on 5/20/2014

How much does it cost to repair a rusted toilet flange on the first floor with a concrete base?

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Unless I knew more about the exact problem and what type of piping was involved it could range between $150 if just replacing the flange with a repair flange (if he can find something solid to mount it to) to the $500 to $600 dollar range if he has to chip out the floor to get at the pipe joint.

If it is PVC or ABS piping he may be able to use a tool caled a hub saver if the floor flange was a male fitting going into a coupling or elbow below the floor. I do not know of one that works on a toilet flange fitting that goes over the pipe.

If the foor is sound and he suggests a repair floor flange you can be comfortable with that repair as long as the concrete is solid.


Answered 6 years ago by ContractorDon


Don's estimate sounds good to me - can take from 1/2 hour to 6 hours, depending on type of pipe and where next joint is - can get really messy with cast iron, where you might have to chase a foot or more under the slab to open up and expose the joint you need to hook onto.

What Don is talking about is a reamer that reams out the old flange piece stickign down in the pipe, so you can glue on another one. For female flanges, there are inside cutters that let you cut off the pipe right below the flange, and you can then glue on an extension piece as needed either female or male. Available for both plastic and metal pipe, though not all plumbers carry them. Does save the cost of hammering away concrete to get to the outside of the pipe to cut it. There are even overcore bits designed to center inthe pipe and drill out the surroundingm concrete to allow for a female coupling ro fitting to be gllued on plastic pipe - but again, only the biggest plumbing repair contractors are likely to have that, as they cost about $400 each, and only fit one size pipe per bit.

Answered 6 years ago by LCD

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