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Attempting to shut off the water to the toilet, however, after turning the knob clockwise all the way, the water still runs. The water stops when I place a plastic bottle under the float ball, however, to replace the components I know I need to shut the water off at the toilet shut-off valve. Should my next step be to shut off the main water shut-off valve into the home?

  • yes, unless there is another valve that shuts water off to the toilet ... why are you asking? – jsotola Nov 16 '19 at 1:45
  • You might try open-close cycling 2 or 3 times. Sometimes this will free up a stuck valve... I have had some luck with this. Otherwise, you'll have to shut-off upstream at the next closest valve. There is usually a whole-house valve near the home entry point. – peinal Nov 16 '19 at 2:44
  • @peinal Sounds like a good answer to me! – Daniel Griscom Nov 16 '19 at 3:32
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Make sure the valve stem is turning and not just the handle. Spraying a little WD-40 in there sure can't hurt. If the valve still won't completely shut off, you'll have to find your whole house valve which is usually on an outside wall in the vicinity of your water meter. These gate valves are notorious for failing too so don't be surprised if they don't work too. If that's the case, there is usually another valve on the line side of your water meter that you should be able to operate. If not, call your water company and they will operate it for you. So if you get your water shut off, this is a great time to replace any of these valves that failed to do their job. good luck.

  • I have had the ribs on the valve rust out and do exactly what jack is mentioning and a pair of pliers were needed to turn the valve tight enough to stop the flow+ – Ed Beal Nov 16 '19 at 15:42
  • And remember the #1 rule about plumbing: never start a project after the store is closed. :) – spuck Nov 17 '19 at 17:34

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