http://www.ionet.net/hsn/plumbing.shtml
This site contains an overview of intelligent plumbing controls and related devices as well as an international list of plumbing controls resources and standards proposals. The site also contains information about other home control resources including the Home Systems Network, a concept based on the communication between devices that control home utilities through a centralized intelligence system of controls. Although the page describes various devices, only the educational materials are available for purchase through the site.