LPCB approved sprinkler system flow meter that can be installed in automated systems, between flanges or with grooved couplings. Unit includes full bore isolating valves for meter isolation, filter cleaning or flow tube replacement, (spare supplied). The in-line filter avoids clogging of the bypass line or the flow restrictor with pipe debris. The bleed valves allow drainage of the metering section and/or venting of trapped air. Suitable for horizontal or vertical pipes.