Picture the scene, a newly fitted 'hidden' cistern all boxed in and ready to
plumb up to and tile in. I go to connect the water feed to the fill valve
only to find none of my BSP fitiings match it. It is bigger than 1/2"
(standard) and smaller than 3/4". So of to the plumbers merchant I go to
get something suitable, three PM's all said "the computer says no", none had
seen anything like it. In the last merchants an old guy comes in looks at
it and says "Chuck that f*****g in the bin and put a standard Fluidmaster
type on. Sh*tty Chinese sh*te". He had a few of these in various toilets
he had fitted and done just that. So of I go home with a 1/2" Fluidmaster
valve in hand and job done. Just out of interest anybody know what thread
it could be it measures O/D = 23.4mm Core = 21.8mm and it is 14 TPI?

Cheers

John