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Antique cast iron sink leak

Posted by deborahc (My Page) on
Fri, Nov 23, 12 at 16:36

Hi all,

We are buying a 1930s house that has a huge cast iron sink in the basement that the washing machine drains into. The sink is leaking in between the sink and the pipe. We think there must be a leak into the actual cast iron bottom of the sink. The water leaks out of the sink itself, not the drain.

Is there any way to put in a new piece of pipe to line the part of the drain with a leak? It would only need to be 4" or so.

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Follow-Up Postings:

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RE: Antique cast iron sink leak

The water that leaks ends up on the floor?


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RE: Antique cast iron sink leak

Yes it's really hard to explain, but there must be corrosion inside the sink and it leaks out onto the floor. It doesn't leak around the drain so the water is traveling.


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RE: Antique cast iron sink leak

Does the sink leak with just 1" of water in it? Does it require several inches of depth before it leaks? Does it leak until it is completely empty?


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RE: Antique sink

You say the sink is cast iron. How did you decide that? Have you tested it with a magnet?


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RE: Antique cast iron sink leak

That sink is probably either soapstone or concrete with some sort of metal edge on top.


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RE: Antique cast iron sink leak

GOod point... I have no idea what it is made of. This is what my husband said :) It is extremely heavy which is why we thought it was cast.

It started leaking almost immediately and leaked until empty. The water didn't even make it to the edges of the sink, it went straight down the drain.


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RE: Antique cast iron sink leak

"some sort of metal edge on top."

Often lead.


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RE: Antique cast iron sink leak

I've seen some where the drain that's embedded in the concrete had corroded and created a leak. Maybe that's what you have going on. Can you see separate drains underneath or just one exit point in the center?


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RE: Antique cast iron sink leak

There is only one exit point, it's in the back corner of the sink. The leaking occurs at the front of the sink. You can see it dripping out there, which is why we think it's leaking into the sink bottom and then draining out.


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RE: Antique cast iron sink leak

There is a stamping on the front, what does it say?? That may shed some light on what its made of?


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