Siamp Compact 95L WC Toilet Cistern Side Entry Inlet Valve made FOR some Sphinx Toilets

1/2 & 3/8 Inch BRASS Switchable brass threads means no cross threading

1/2" (38mm long, measures 20mm in diameter) 

3/8" (35mm long, measures 16mm in diameter)

Compact design with integrated float system

Not sure which size you have? This valve is perfect as it covers the standard U.K. thread and the non-standard, usually found in Foreign toilets or some toilets that Wickes sell

Silent fill from base of valve