Plasson Gladiator Concentric Water Meter with a 1 1/2" BSP thread is a positive displacement water meter with rotating piston. WRAS approved to maximu working pressure of 16 bar. WRAS Approved - ISO 4064 (class D). Rotating piston measures water usage with each revolution. Can be installed hoizontal, vertically or inclined. Designed for high accuracy and wide measuring range. Sealed super-dry register. IP68 Pulse under the glass register. Maximum working pressure 16 bar