Cistern overflow

silvercar

Can anyone advise how I stop this? Flushed the toilet and now the cistern is constantly overflowing into the pan. I’ve isolated for now, but want it working again. 

I’ve taken the top off the cistern and can see the water is overflowing from the white circle in the centre. 

Bigphil1474

Doesn't it have some sort of ball co c k (float valve) to stop the water as required?

silvercar

Bigphil1474 said:

Doesn't it have some sort of ball co c k (float valve) to stop the water as required?

Only has what is in the picture. I wonder if the blue thing on the left is some sort of float valve that has stopped floating 

silvercar

This looks similar to what I have on the left:

CliveOfIndia

silvercar said:

Bigphil1474 said:

Doesn't it have some sort of ball co c k (float valve) to stop the water as required?

I wonder if the blue thing on the left is some sort of float valve that has stopped floating 

I think you're spot on there - looks very similar to mine.

The little plastic cross-head screw on top of it is an adjuster - try using that to adjust the height at which it shuts off the water flow.

It's also worth seeing if you can give the mechanism a bit of a clean - just to make sure the float slides up and down the upright pillar freely.

If all else fails, there's a possibility that the float has got a puncture.  If that's the case you can usually bodge a fix with a bit of waterproof glue - if you can see the hole or crack or whatever.  But a replacement part is pretty cheap and easy to get hold of either online or at a plumber's merchant, and is not difficult to replace.

But try a bit of cleaning and adjustment first, it'll cost you nowt to give it a go.

ThisIsWeird

Yes, that's the inlet valve, and almost certainly the guilty party.

Before you touch anything, check the supply pipe under the cistern and see if it has an isolating valve on it - a chrome fitting with a screwdriver slot in the side. If you turn this thro' 90, it should shut the water off to the cistern. You can do that now so to stop wasting water.

Then track down instructions for that inlet valve and how to dismantle it in situ. Almost certainly it is cleanable/fixable and will solve the problem.

Could you take some close-up pics of the valve? Any writing on it - make?

I wonder what these white bits are?

MikeJXE

Are you certain it's not the button sticking down slightly ?

silvercar

It’s not the button sticking down, because I took the button off completely.

the white bits rub away - possibly perished tape of some kind.

toilet brand is indusa. Can’t find that anywhere.

more pictures:

ThisIsWeird

Isolating valve?

silvercar

ThisIsWeird said:

Isolating valve?

Yes, I’ve isolated it.

kipsterno1

There is normally a rubber diaphragm that causes the water to stop when the float rises. These will perish with time or if lucky just need a clean and reseating.