Macnaught Engineering & Manufacturing Macnaught Pty Ltd, is a privately owned Sydney, Australia based corporation. Established in 1948, Macnaught has been designing and manufacturing industrial grade Positive Displacement Oval Gear Flow Meters, Retracta Hose Reels and Grease / Oil / Fuel Fluid Handling Products for the agriculture, automotive, chemical, industrial, general process, marine, mining, OEM and transport industries. Macnaught has maintained a strong reputation for designing and manufacturing innovative, high quality, durable products which are well supported with technical advice and service..