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View the thread, titled "Toilet flush valve seals - unusual sizing" which is posted in Boiler Advice Forum on UK Plumbers Forums.

Hello,

Recently I received an unusually large water bill which led me to the discovery of leaking flush valves. I have two toilets and it turned out in both the valve seals were bubbling so I set out to replace them. For now I just flipped them over as the other side was smooth on both.

The problem is that I'm having a hard time finding a replacement. The flush valves are of unknown make (it says WRAS and UPC on them) and they come with different size seals, both unusual from what I see.

The first one is flat, outer circle diameter 66mm, inner diameter 31mm, 3mm thick.

The second raises towards the middle from 2 to 3mm, outer diameter is also 66mm, but inner is 35mm.

I have only found 1 seal on the Internet that is 66mm, but 40mm inner circle. Most of what I've seen were 63mm.

Is there anywhere I can order seals to size? Or should I try and find a larger one and trim it to size? Or maybe replace the valves with something that comes with more common seal size? Giving the cost of ordering the seals, which looks like a tenner each inc. postage replacing the valves won't be much more expensive, just more work.

flush-valve-1.jpg
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