Twist and Lock" Fittings - Speedfit SpeedFit Twist & Lock Fittings The Speedfit® Twist and Lock range features the same grip and seal method as the Speedfit Standard Push-in range with the added benefit of having inserted the pipe, a simple twist of the screwcap locks the pipe into position. This increases the compression on the O-ring seal for added security. Approved to BS EN ISO 9001; BS 7291; BS 2871 Part 1; BS EN 1057: 1996; WRAS; BBA Working pressures: 12 bar at 20°C, 6 bar at 65°C, 3 bar at 92°C Instruction leaflet included