Backflow prevention devices

Devices created to prevent pollution by water mains backflow.

Filtration is a physical-mechanical process in which a moving medium separates from the solid particles dispersed in it thanks to their being captured by a porous filtering strainer through which the medium is passed. The strainer retains all the particles larger than the diameter of the filter mesh at the first passage.

The anti-pollution check valve is a protective plumbing device capable of preventing the backflow of polluted water into the mains system. This may occur due to changes in pressure in the distribution network that cause water to flow backwards. The check valve, which is fitted between the main water system and the user system in water distribution solutions, prevents any contact between the water in the two systems, as it closes automatically whenever backflow conditions occur.