Anti-pressure valve - what is it and is it needed in a home installation?
Anti-contamination valve is a special type of check valve, the main task of which is to protect drinking water from secondary contamination. It acts like a one-way guard on the pipe - it allows water to flow only in the direction to the building, but in the event of an attempted reverse flow (backflow), it automatically blocks its path. This will ensure that contaminated water from the indoor system does not back up into the water mains or into other parts of the home system.