last week I heard a kind of hissing sound coming from my toilet. I don't use that toilet much so I just turned off the water from the bottom and the noise stopped. Well I really can't believe this but now my other toilet is hissing even louder. I don't see any leaking in the tank just noise coming from around the red cap on the toilet.

I took a video and put it on youtube so you could hear the sound.

I could really use some advise on this, I'm not feeling well these days and really don't need this added stress. I called a plumber and he said he would take care of both toilets for 220 but I really only want to spend that much if it's really necessary. Thanks in advance. .

  • why did you not include a link to the video? – jsotola Aug 17 '19 at 4:17
  • turn the water back on, but only partially – jsotola Aug 17 '19 at 4:22
  • i found the video ... i don't hear any abnormal hissing ... do you by chance wear a hearing aid? – jsotola Aug 17 '19 at 4:24
  • no hearing aid, there is a hissing sound but it's hard to pick up on video I guess. – C. Davis Aug 18 '19 at 2:43
  • I didn't post the link because I didn't know if it was allowed on this website – C. Davis Aug 18 '19 at 2:45

I don't know what a "red cap" is on a toilet, but if it's hissing then water is passing somewhere and the most likely is that the float-valve is letting through.

It might stop if you bounce it a couple of times, if some grit has got in the mechanism, but otherwise it's a new valve or washer/diaphragm depending on the type of valve.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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