I need to replace our toilet fill valve (bottom fill, brass shank) and I've noticed that most on sale have a 1/2" thread. I've measured the thread sticking out of the bottom of our cistern and it's more like 3/4" dia. Do we have an "unusual" size, or do I just buy one with 1/2" and put it down to one of these weird plumbing measurement things?!
Also, Will I need anything to seal the large plastic washers or will the valve come with rubber seals?
Also, Will I need anything to seal the large plastic washers or will the valve come with rubber seals?