The flap valve in my toilets' cistern is on the way out. It'a a modern two-part siphon so is easy enough to lift out and replace the valve.
Trouble is that I don't live close to any DIY places that are likely to stock a flap valve (siphon washer/cistern diaphragm - whatever!) so are there any places where I'm likely to be able to get one mail order?
I've already tried Screwfix but to no avail.
Thanks Phli