Abstract: A mapping and flow monitoring system allowing real time flow monitoring in a plumbing network. The mapping and flow monitoring system is comprised of (i) a network of at least two pressure sensors and, to analyze and understand the plumbing network with greater resolution and accuracy, additional pressure sensors and/or networked sensors for other water parameters including but not limited to flow rate, temperature, vibration and water quality, (ii) data acquisition and management hardware and software, (iii) data analyses (both edge/distributed computing and centralized computing), and (iv) plumbing network interpretation and diagnostics. Uses of the mapping and flow monitoring system include but are not limited to mapping extant plumbing networks, usage monitoring, development of a knowledge base for improved selection of plumbing network components, automated controls operation, anomaly detection, and identifying unique plumbing network characteristics.