Has anyone ever dealt with M.I.C. in cast iron sanitary lines? I have a large building that has 2-4" cast iron drains that look like they have little rust piles building up on them. We sent a piece of pipe in to be tested, and was told it was M.I.C. Is there a solution to this short of replacing? Is there a "flush?" How do I check piping that is in the walls? This is a four story building. Thanks in advance for any help!

Did the testing agency provide any recommendations? Is this a "normal" office building with typical waste going into the sewer drain, or is non-typical waste (industrial/medical/chemical waste) flowing into the line and contributing to the problem?



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Pipe corrosion, my guess is it is not normal waste hitting that line depending how old the building is. if from the building out to the street it is a relatively easy replace with plastic ( depending on circumstances ) to the street still gonna be big bucks if the street has to be cut and blocked if it is semi normal rust nodules on the interior of the pipe which happens with cast over years some time it can be cutout or at least scraped off to help open the line with out replacement right away however it will need to be replaced

PlumbCat TM 2003


Plumbermandan



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How old is the cast iron?.

I hope you didn't pay for that testing. It's a "you know what" pipe. What other type of corrosion would you expect?

It is an apartment building for seniors. They only suggested that their may be a treatment of sorts. It was no charge. It was built in the early 80's.



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When you removed the piece of cast iron pipe to send it in for testing did it seem sturdy and structurally sound? Or was it brittle and crumbly? Where you removed that sample piece of pipe for testing will it need replaced/repaired? If you decide to replace the drain lines you might want to consider doing the horizontal runs first and see how that goes. The vertical sections of pipe don't get the same amount of wear or accumulation of waste since most of the waste quickly falls thru the vertical pipes, instead of flowing more slowly like it does in the horizontal pipe. Keep in mind that cast iron has been used for decades to carry human waste and is presently installed in millions of homes and buildings everywhere. So unless you have a unique situation you may be getting jacked by someone that wants to sell you a "protective pipe coating" installation or some other work that likely isn't needed. If you've ever bought a new car you may have seen the dealer try to sell you extra undercoating on the bottom of the car - similar thing.

If you can post a photo of this corrosion that would be great so we can take a look at it.



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