BS 1212-1 – Float operated valves. Specification for piston type float operated valves (copper alloy body) (excluding floats)
Specifies materials, workmanship, dimensions and performance requirements for piston type valves of nominal size 3/8, 1/2, 3/4, 1, 11/4, 11/2 and 2, intended for use with floats complying with the requirements of BS 1968 and BS 2456.