While replacing an old porcelain bathroom sink (probably 1940s?) I discovered modern supply lines don't work. (The original was a metal tube.) A big box store guy suggested using a toilet supply line upside down. That worked fine at the sink but the shut off valve end leaks as the thread are ALMOST the same. I'm not proud of the half assed "fix" I did to stop the leak.

I need to replace a second sink with a correct line.

What word/s do for the correct part should I use when searching for one online? Even an old hardware store had no idea.

I really don't want to risk replacing the shut off valve knowing that could lead to a bigger job.



Edited 1 times.

I have no idea what kind of thread you are working with, but a closet supply line is not normally compatible with ANY faucet thread. A picture might help.

need a 1/2"(F)NPT x 3/8 compression adapter


probably trying to attach to a street 90

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638