Each property receives a bill for their own use through their sub meter. We then add up the usage from all the sub meters and compare this to the master meter usage. The master is the first in line so will capture all usage going through the private network.
If there is a difference in usage then each dwelling that is connected via the master will receive an equal share of the usage.
Example:
Network of master meter and three sub meters (kL = kilolitre):
Usage for network is master 36 kL, sub 1 = 15 kL, sub 2 = 8 kL, sub 3 = 10 kL
Total usage for all sub meters = 33 kL
Calculation:
Sub 1 = 15 + ((36-33)/3) = 16 kL
Sub 2 = 8 + ((36-33)/3) = 9 kL
Sub 3 = 10 + ((36-33)/3) = 11 kL
Total network usage = 36 kL (16 + 9 + 11)