BS 6675:1986

Three patterns of servicing valve: spherical plug, tapered plug and screw-down, of nominal sizes 10, 12, 15 and 22, suitable for working pressures and temperatures from 16 bar at up to and including 30°C to 5 bar at a maximum of 120°C. The purpose of the valve is to isolate water supplies to individual sanitary appliances so that those appliances can be maintained or serviced.

Cross References:
BS 864:Part 2
BS 1010:Part 2
BS 1224
BS 1400
BS 2494
BS 2767
BS 2871:Part 1
BS 2872
BS 2874
BS 6700