Devices to prevent pollution by backflow of potable water - Air gap submerged feed incorporating air inlet plus overflow - Family A, typ C

This document outlines technical specifications for protective devices designed to prevent backflow contamination in drinking water systems. It specifically addresses Class C types equipped with submerged inlet devices, air vents, and overflow pipes. The standard establishes criteria for the design, manufacturing, and testing of air gap solutions, which serve as a critical barrier against the reverse flow of contaminated water into potable water supplies. It defines the necessary geometric dimensions, material requirements, and performance thresholds to ensure the device functions effectively under various operational conditions. The content covers safety mechanisms related to pressure fluctuations and flow dynamics within the system. Compliance with these technical requirements ensures that the protective equipment can reliably maintain water quality by preventing pollutants from entering the distribution network through back-siphonage or back-pressure scenarios. The document provides a framework for manufacturers and engineers to create robust systems that protect public health and maintain the integrity of drinking water infrastructure.