How do I know my meter size?
The serial number on your meter tells you the size of the meter.
If your meter starts with a 'B', it is a 20mm meter - most residential properties have a 20mm meter.
If it starts with a 'C' it's a 25mm meter.
If it starts with a 'D' it's a 32mm meter.
If it starts with an 'E' it's a 40mm meter.
If it starts with an 'F' it's a 50mm light meter.
If it starts with a 'G' it's a 50mm heavy meter and so on.