Re: I want a smart water meter
In the UK we don't use flap valve toilets because they're rubbish and often leak.
We use siphon flushes, these are inherently leak proof as there is no valve at all between the cistern and the bowl.
My loos are at least twenty years old and have never leaked. One of them might be older than me, it's hard to be sure.
I've replaced one filler valve, and one flush lever arm after it rusted through. That's it.