According to the rule of thumb, how should the size of a meter relate to the service line?

The guideline regarding the size of a water meter in relation to the service line is that the meter should generally be one size smaller than the service line. This approach allows for a balance between accommodating high flow rates through the larger service line while ensuring accurate measurement of water usage by the smaller meter. If the meter were the same size or larger than the service line, it could lead to inaccuracies in measuring flow rates, particularly at lower usage levels. A smaller meter size encourages a more consistent flow within the meter’s operational range, which is key for precise billing and monitoring of consumption.

This guideline also accounts for the potential for variations in flow rates and potential future demand, ensuring that the system remains efficient and functional under different usage scenarios. Understanding this relationship helps in designing effective water distribution systems, leading to proper sizing of both meters and service lines to optimize performance and measurement.