Rückflussverunreinigungen

Rückflussverunreinigungen, also known as backflow contamination, refers to the undesirable reversal of fluid flow in a piping system, which can lead to the contamination of potable water supplies. This phenomenon occurs when the pressure in the distribution system drops below the pressure in a connected, potentially contaminated, service line. Such pressure drops can be caused by various factors, including water main breaks, firefighting operations, or excessive water usage, creating a vacuum or negative pressure.

When this negative pressure occurs, it can draw water from a service line, which might contain contaminants from cross-connections. Cross-connections are any physical links between potable water systems and non-potable water sources or contaminants. Examples include submerged inlets of hoses in swimming pools, connections to boilers or heating systems, or irrigation systems. The reversed flow can pull these contaminants into the clean water supply, posing a significant public health risk.

Preventing Rückflussverunreinigungen is a critical aspect of water system management. This is primarily achieved through the installation and regular maintenance of backflow prevention devices. These devices are designed to stop or check the reverse flow of water. Common types include atmospheric vacuum breakers, pressure vacuum breakers, and reduced pressure zone assemblies. Local plumbing codes and regulations typically mandate the use of these devices in specific applications deemed at higher risk of cross-connection. Regular testing and certification of these devices are essential to ensure their continued effectiveness in safeguarding the public water supply.