Why would I install a check meter?
If you use a shared meter and want to record your own water use, a check meter is cheaper than separating from a shared meter.
An example is a property owner who has a granny flat. They can measure the amount of water their tenant is using, and legally charge the tenant for it under the Residential Tenancies Act.
Check meters are also used in blocks of apartments or townhouses. The body corporate reads the check meters, to share out the monthly water bill between households.