Bakflödespreventer

A bakflödespreventer, also known as a backflow preventer, is a plumbing device designed to stop contaminated water from flowing back into the clean water supply. This backward flow, termed backflow, can occur due to changes in water pressure, such as when a fire hydrant is opened or a water main breaks. Without a backflow preventer, substances like sewage, chemicals, or sediment could enter the potable water system, posing a serious health risk.

There are several types of backflow preventers, each with its own method of operation. Common designs include the atmospheric vacuum breaker, the pressure vacuum breaker, the reduced pressure principle backflow preventer, and the double check valve assembly. Each type has specific applications and is approved for use under different conditions and for varying levels of hazard.

Installation of backflow preventers is often mandated by local plumbing codes, especially for properties with potential cross-connections. These can include irrigation systems, commercial kitchens, industrial facilities, and buildings with fire sprinkler systems. Regular testing and maintenance are crucial to ensure the backflow preventer functions correctly and continues to protect the public water supply. These tests are typically performed by certified professionals.