Master-Trol is an electronic water management system by Acorn Engineering, enabling comprehensive control over water fixtures in facilities, with capabilities to monitor usage, report data, and prevent abuse. It supports up to 3,072 valves via a single server, has been refined over 20 years, and is applicable in challenging environments like prisons and jails, contributing to significant water conservation. Enhanced features include real-time monitoring, user activity tracking, and compliance with LEED standards for water efficiency.