Toilet flush issue

[weel...]

Its a dual button flush, if the button is held down until cistern empties then water runs to fill but doesn?t shut off, if however I give it a small tap it then shuts off and fills. Now I would have thought a piece of debris at the seal from cistern to pan, however when it fills there is no leakage to the pan as I would have expected. (I also have an issue as the innards I cant turn sufficiently to extract them as they hit the side of the cistern before it lines up to lift them out.) I am thinking that possibly it is something to do with the push buttons.

Any thoughts?

[SH]

you might have a pin hole leak in the tubing between push buttons and the cistern or a poor seal in piston driven by said push button

[John Rumm]

Are the buttons pneumatic or cable operated? If the former, then it is probably the flap valve that is sticking - most likely easiest to replace the whole thing since they are not always easy to get into and are fairly cheap.

If its cable operated then it might be the cable that is sticking - a bit of disassembly, cleaning, lubricating and putting back together might fix that.

(You can't normally remove the valve from inside the cistern - you need to separate the cistern from the pan to get at the nut on the outside of the cistern. If doing that, make sure to replace the doughnut washer at the same time since they often leak if you reuse an old one)

[Tim+]

+1

We used to have a ?sticky? valve that wouldn?t close after a flush although would free off after a bit of jiggling.

It took it out several times and fiddled with it but I could never identify what was causing the issue. Invisible wear somewhere I guess.

Replacing it was pretty easy and cheap.

Actually, a lot of them (if not most of them) can be replaced without having to mess about with the cistern or the pan. They are designed to be serviced/replaced with minimal disturbance to anything else.

Tim

[weel...]

Cable, so will take that apart and see if I can sort it. The internals are held in place by a sort of flange thingy so rotates and then disengages to lift out, I can rotate it so far which gets it loose but not enough to fully disengage it. I am trying to avoid a dissembling the cistern from the pan.

[John Rumm]

You might find you can twist the flange clockwise a bit to get more (or less!) twisting room - that would be tending to tighten it against the backnut a bit, so ought to be fairly leak risk free.

[Pamela]

If your loo is anything like mine then it was fixed by replacing a punctured shutoff diaphragm (behind the large knurled screwcap at the top). Even I could do it, although I couldn't free up the tight knurled screwcap by hand.

[Tim+]

The problem isn?t non-stop filling though, it?s non-stop emptying. It?s the flush mechanism thats faulty.

Tim

[Ian Jackson]

Any use?

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