Cistern bung

If its to be permanent, tape up the outside with parcel tape and apply a nice fat blob of car body filler to the inside.

Remove tape, and paint it white outside

Good bodge! Keep them coming, please.

Is the washer on the correct side?

This

Screwfix reviewer

" As another reviewer said, make sure you centre the plug in the hole and keep it there as you tighten the nut. There will typically be lots of free play between the plug tail and the hole in the cistern, so if you don’t keep it centred you’ll get a leak. And test it with a small amount of water before you fill the cistern. "

Thanks. I saw that review, and it's why I bought the plug, and sawed off the old overflow, unnecessarily. Talk about gilding the lily!

I also saw the BES plug and came to the same conclusion as you.

On Tue, 25 Oct 2022 18:05:05 +0100, GB snipped-for-privacy@microsoft.invalid wrote: [snip]

Reminds me of the old story about the doctor who phoned the plumber at

in passing: sometimes O-rings can make a small shaft fit in a larger hole and seal.

Thanks. Good idea. I am going to try something similar, namely silicon-ing the washer in place, so it's central.

If all else fails, I'll try car body filler, but if I mess that up or it's not waterproof enough it will be time for a new toilet. I'll try some of the alternatives first

Oh that definitely works too. If you can stabilise things while it sets silcone makes a super gasket

You can buy a larger blanking plug.

And I can assure you that *provided the ceramic is dry* car body filler sticks like s*it and is 100% waterproof.

When I had to fit a tap that fitted like a prick in a bucket I made a collar from some plastic pipe. It wasn't big enough to go all the way round but, at about 7/8 of the circumference was adequate. If you have some pipe that's a bit too big but about the right wall thickness, cut a section out and, using heat if necessary, cludge it to fit. Should take up most of the slop.