float valves

[bossanova]

in which of the following type of float valve is it poosible to replace the piston
a) brass diaphragm
b)brass portsmouth
c)torbec equillibrium

thanks

 

[WHPES]

The Portsmouth valve, but I've never heard it called that for years. Nowadays just referred to as a Part 1 cistern valve.

Anyone come across a Croydon valve recently? Never seen one for ages.

 

[dontknowitall]

Bit far from Croydon or Portsmouth to see one of these in Herefordshire ...