Why will my tap not turn off?
You can turn off the mains water stopcock by turning it clockwise only. Once you have turned this off, then you should have no more cold water coming through the taps, but if there is still a continues flow after a couple of minutes, then the most likely reason is because the stopcock is classed as not fit for purpose.
Hereof, why has my tap stopped running?
Examine your cold water cistern The ball valve may be stuck, which will have caused the cistern to empty. If this is the case, sharply move the float arm to dislodge the valve, and then give it a proper clean. The cold water cistern should fill up and your taps should start working again.
Also, can you change a faucet without turning off the water? As a matter of fact, you can‘t even take off the old faucet until you turn off the water. You may have to look around a bit if you can‘t find an obvious way to do this, such as turning off the valves under the sink.
Subsequently, question is, should I turn water off to change tap washer?
To start, turn off the mains water supply by turning the main stopcock off – a valve normally located under your kitchen sink – until your tap runs dry. If you are changing the washer on hot taps, you must also turn the immersion heater and boiler off. Note that monobloc taps do not have washers.
What is the cause of a dripping tap?
A dripping tap or leaking tap usually means that the tap washer needs renewing, but it can also be caused by a damaged valve seating. If the drip is from a mixer nozzle, then change both tap washers. 1 Turn off the water supply to the taps *. Remove the head of the tap.