Help with toilet overflow

danrv

https://forums.moneysavingexpert.com/discussion/comment/81867239#Comment_81867239

That's why I usually replace the whole part.

WIAWSNB

The last two I replaced, in both cases the rubber washer had hardened and virtually set in the closed position, so barely let through water even when relaxed.

The valve 'seat' is unlikely to be worn, but should be checked and cleaned. Then give the washer a nice smear of silicone grease to help protect it, but to also ensure a complete seal when off. Not essential at all, but just something I do.

Alderbank

https://forums.moneysavingexpert.com/discussion/comment/81866978#Comment_81866978

Do you have a stop c0ck somewhere inside the house such as under the kitchen sink?

If so, screw it closed (you know it is closed off when the kitchen cold tap stops running).

Flush the toilet in question. If it doesn't refill then it is mains fed and you can proceed to fix it.

If it keeps flushing it is fed from the tank, so just open all the cold taps and keep flushing it until it doesn't refill. It shouldn't take long.

WIAWSNB

Or go up to the CWS (cold water supply) tank in the loft, the larger one if there's two, and locate the shut-off valve on the large pipe coming out near the bottom. And hope it turns easily.

silvercar

It’s fed from a water tank.😕

I think I may get an expert in. Though watching the level rise overnight, it would probably take 3 days from a flush to reach the overfill. This is a toilet that isn’t used very often!

silvercar

https://forums.moneysavingexpert.com/discussion/comment/81867588#Comment_81867588

No-one has done that as fas as I know in the 18 years I’ve lived here. ‘Hope’ is carrying a lot of weight.

WIAWSNB

https://forums.moneysavingexpert.com/discussion/comment/81867618#Comment_81867618

Yup. It's one of these easy tasks that can turn in to an absolute 'mare :-)

grumpy_codger

I think I may get an expert in.

Consider adding an isolating valve at the same time.

plumb1_2

if it’s feed off a tank, then the isolation valve might be iffy to turn off.

But you will be able to drain off from the bath tap, so don’t heat any water in the cylinder before the plumber comes as it might be wasted.

Also tell the plumber that it’s feed from a tank, as you’ll need a low- pressure ballvalve

silvercar

job done. Thanks for all your advice.