The Approved Ball Valve has been certified by both Watermark and GasMark. This 40mm Ball Valve is designed to control water flow, allowing water isolation and pipes/taps to be shut off at the point of the ball valve. The Product has been pressure tested to 2500kPa for sizes ranging from 15mm to 25mm and has been tested to 1600kPa for sizes ranging from 32mm to 50mm.