By turning the lever on the outside of the valve body. When you turn the lever in line with the tubing of the plumbing system, water flows through the hole in the middle of the ball. When the handle ...

Parallel BSP male-to-female connections. Handle, lever or T-handle options made from die-cast aluminium, 1/4 in. and 3/8 in. T-handles made from nylon. Maximum operating water pressure 32 bar.