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This is very simple, the basin stop valve is broken (faucet), the ball core inside is loose or stuck, the hole is not symmetrical, and it is normal to replace it with a new one.
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If you have a problem with the plumbing, find a plumber. Normally, you can't do this kind of thing yourself. The heart of a decorator.
Water quality and water pressure are exactly the same, they are two pipes separated from one main pipe, both from the main pipe.
Toilet faucets?
See if there is an angle valve on the inlet pipe, and whether the angle valve is closed? >>>More
Or there is a switch in the middle of the pipe, there will be no water Hello. If it is connected normally, see if there is a separate switch.
Such a leak can be repaired if the handle of the faucet can be disassembled, and it is a broken rubber pad inside.
Turn off the main valve or toilet toilet angle valve, change the faucet or change the rubber gasket.