Leaking Toilet Cistern

ingalway

Hi.

The toilet overflow is leaking from the cistern into the toilet. When it flushes the gray arm pops up which I assume should then stop the water filling but water keeps coming in and out the overflow pipe.

Any idea what can be done to stop it please?

DublinDilbert

Sounds like an issue with the inlet valve on the RHS over filling the cistern. Many of these contain a diaphragm washer which can be changed, but you will need to get exactly the right one, shut off the water and strip down the unit. Sometimes the diaphragm washer is expensive, so you are almost best buying the completed unit. Check out the likes of screwfix for inlet values, they have the complete units from about €10 upwards.

DublinDilbert

https://www.boards.ie/discussion/comment/120078905#Comment_120078905

It’s probably not too bad. Buy an identical one, take it apart and remove the washer, shut off water and put it into your own.

dodzy

If you isolate the water supply, you can disconnect the internal part of the inlet mechanism easy enough. Most have a retaining clip along the lower section inlet pipe, once released the complete mechanism can be lifted off, but you leave the actual inlet piper in situ. If you can get a like for like replacement, you can avoid the need to drain down the cistern and having to replace the inlet part of the unit. Unlikely to be a diaphragm washer. A failed one typically results in a very restricted refill flow, not the opposite.

ingalway

Thank you. I was hoping it might be something easier.

triona1

I've had this problem if you push down the yellow part and hold it the cistern will fill then release the yellow part up to the blue part.