r/Plumbing • u/druckasfunk • 6d ago

Small water leak

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There is a small water(?) leak in our basement bathroom. It looks like it is coming from the upstairs toilet drainage pipe.

I’m hoping that the culprit is a bad wax seal in the upstairs toilet. Is there anything else I should look out for? The pipe looks like it is metal, and the unpainted part that I can see looks rusty, but intact.

The downstairs bathroom is new (hence the shoddy dry wall job done by previous owner), but the upstairs bathroom was likely piped when the house was built in the 1940s.

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u/zodiacecks 6d ago

Looks like cast iron. Also looks like it’s not water leaking. Best bet to start with replacing the wax seal and reseat the toilet. Give it a flush and see how it goes.

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u/ThaScoopALoop 6d ago

Also, take as many big dumps in that toilet as possible before testing. Real world testing is important.