The objective is to obtain relevant and useful data, while using the minimum number of measurement points. While it is possible to measure every flow and sample everything, it is neither practical nor cost-effective.
There are a variety of meter types that can be utilized to obtain water flow and volume information. Care must be taken to ensure that the temperature and/or composition of the water being measured is compatible with the meter type being considered.
Example: Every time the kettle is rinsed, the meter shows a range of 270 – 330 L used.