Can't Shut Off Cold Water Supply When Replacing Sink Faucet: Possible Causes & Solutions

hi Forumers,

I'm completely green when it comes to these things, but I'm counting on your help..

when replacing the sink faucet, I discovered that the cold water valve (in the picture on the right) does not work,

i.e. I have constant access to cold water and even though I turn off the valve, water continues to flow.

the main water valve on the cage works,

What is a cause of it? what can you do?

ps. what is the function of this yellow-green wire? ( at the bottom of the picture)

Probably the knob rotates around the axis of the valve and therefore you cannot turn off the water, it remains only to replace the valve with a new one. The cable in question is connected to the metal parts of the bathtub, shower trays, etc.

Torn thread in the valve, possibly damaged plug seal. Close the water supply in the connection, unscrew the valve heads and check. Call an electrician to the yellow wire, because hell knows what he is. HE. (Electrician), having qualifications and appropriate SEP licenses, will measure with an appropriate device, e.g. IMU type. But in fact, is it OBLIGATORY to use the PE potential equalization conductor in plastic sanitary fittings according to the regulations in force in Poland? In the US, no.

Hello
The knobs on these valves are plastic, and often turn on the valve shaft while the shaft does not turn.
In this situation, you need to remove the knob, and gently try to turn the valve directly behind the axle. The axle is cut on two sides. You need to fit a flat or adjustable wrench there.
If it still does not turn, it means that the ball in the valve is blocked and the valve needs to be replaced. Do not turn the valve shaft by force, as this may result in unsealing of the valve and flooding the room with water.
If the main valve on the staircase is out of order, report this fact to the building administration. They should keep on doing it.
This wire is the equipotential bonding (equipotential bonding) and should be connected to the metal parts (in this case to the water pipes).
Regards.

I have the same one on the inlet to the cistern, the cistern started leaking, the valve has never been moved /about two years after installation/ it does not close the water.
In a word, shit.

No shit, just a stone in the water .

niewolno2 wrote:

No shit, just a stone in the water .

However, crap, for 10 years I had an ordinary screw-on one and if I hadn't renovated the bathroom, it would probably still work today, and the water is the same!