As of 2015, some Neptune water meters include the residential models T-10 and Aquity. These water meters offer a lifetime guarantee and a lead-free bronze alloy casing.
The T-10 water meter comes in five sizes ranging from 5/8 inch to 2 inches. One version features a double check backflow feature. This meter offers time-proven accuracy with a nutating disc that operates on the positive displacement principle. This water meter helps utility companies get the most revenue available.
The Aquity design is most useful in submetering situations. It features a shorter lay length meter and meets the American Water Works Association C700 Standard for the metering of cold water. This meter also operates on the positive displacement principle.