- Class A – 140 to 350 litres per hour
- Class B – 70 to 280 litres per hour
- Class C – 35 to 52 litres per hour
- Class D – 26 to 40 litres per hour
- Single Jet – water flows directly onto an impeller turbine.
- Multi Jet – water flows on to multiple points on the impeller turbine and which aid reliability and longevity.
- Volumetric – also known as positive displacement meters. They measure water volume by splitting the water into set fixed-volume amounts then counting the number to determine the total volume.
There are 3 types of water meters: