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What size are bathroom faucet water supply lines?

What size of water line goes to a bathroom faucet?

2 Answers

It really depends... you will want to determine the nut size for each end of the water supply line. I've had to do this before and one end was 3/8’’ to valve outlet and 1/2” to faucet on the other, but they also come with 1/2” on both sides.


3/8" to 1/2"

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