Water valve to toilet will not stop water supply even when valve is shut off. I have opened and closed the valve several times but water continues to be supplied to toilet.

marked as duplicate by Tester101 Sep 6 '15 at 12:10

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.


It is very common for the "stop valve" (the local water supply shut-off valve for a plumbing fixture) to leak by. Over the years the rubber bibb washer either softens to the point that is disintegrates when tightened down against the valve seat, or calcium scale or/and mineral deposits prevent proper sealing. Try opening and closing it a few more times, then use pliers to actually force it closed. Any of the following scenarios could play out:

  • the water flow will stop*
  • the flow will not stop*
  • the handle will break or be crushed and the flow will not stop*

    *these scenarios require that you shut off the main water supply to the house/area and repair or replace the stop valve (most likely replace).

  • I agree with the poster, but please note the star: you need a new stop valve! – Andrew Sullivan Sep 6 '15 at 2:07

Not the answer you're looking for? Browse other questions tagged or ask your own question.