Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B - Type A

This technical specification addresses the critical issue of preventing water contamination in drinking water systems caused by backflow phenomena. It specifically focuses on the technical requirements for adjustable backflow prevention devices classified as Type B, Class A, designed for applications involving low-pressure zones. The document outlines the necessary performance criteria, testing methods, and marking requirements to ensure that these devices effectively safeguard public water supplies against pollution risks. Detailed provisions cover the operational mechanisms, structural integrity, and functionality under various pressure conditions typical in building plumbing networks. Compliance with these guidelines ensures that water utilities and construction professionals can install reliable protection measures to maintain water quality standards. The specification serves as a reference for manufacturers and regulators in evaluating product safety and efficacy in preventing cross-connection hazards. By adhering to these technical parameters, stakeholders contribute to the overall safety and reliability of drinking water distribution infrastructure.