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It's okay to change the core, and the leather pad inside is worn, which is a very common problem.
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You have to buy a new one to replace it, the valve inside is probably worn out, it should not be limescale or rust.
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Kid, I don't understand what you're talking about.
A tee can be installed at one outlet to direct the water in both directions, so that an electric water heater can be installed. I hope my answer can help you.
You can go to the hardware store and buy another dual-pass one. >>>More
Arrow after-sales should be able to solve, call it hotline or distribution phone,
It should be that the valve core of the inlet valve is loose and resonates, so it is recommended to change the inlet angle valve.
, the rubber ring inside is broken, unscrew the faucet counterclockwise, find a waste inner tube, scissors cut a rubber ring, and replace it. Or just get a new faucet.