Cistern Issue

vicwatson

Had a constant slow stream of water down the back of the bowl



Changed the inlet valve from an old ballcock to a fluidmaster pro 45b


Water still flowing down back of bowl, its not major but it is still flowing gently


I was told by a plumber that a new inlet valve would sort the problem but this hasn't happened


Could it be the flush valve? is there a seal in them that could have worn and can be replaced?

Bertie Bassett

I have a similar problem at the moment - a very slow drip of water down the back of the bowl. I checked it out and my problem is caused by a perished washer underneath the cistern where the water drains out to the bowl, there's a large hole about 2cm wide with a pipe connected to it. I'll drain the cistern at the weekend and have a proper look and hopefully it is a straightforward job to replace the washer. I'd be interested to hear what other people think.

K.Flyer

vicwatson wrote: »

Had a constant slow stream of water down the back of the bowl



Changed the inlet valve from an old ballcock to a fluidmaster pro 45b


Water still flowing down back of bowl, its not major but it is still flowing gently


I was told by a plumber that a new inlet valve would sort the problem but this hasn't happened


Could it be the flush valve? is there a seal in them that could have worn and can be replaced?

The new filling valve will have stopped the cistern from overfilling and consequently overflowing.
Modern push button type Flush Valves do have a rubber seal on the bottom of the valve to stop them emptying into the pan.
Quite often I find gunge or bits of plastic from "Blue Loo" type products get caught under the seal and need to be cleaned out and that solves the problem.
Sometimes the seal is damaged from these products and becomes distorted causing water to escape, then the seal, or the entire flush valve needs to be replaced.