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Tagged backflow contamination

Do you have a swimming pool or irrigation system? You might need this.


Backflow preventers are required by every local water utility.  These devices allow water to flow in one direction, but prevent it from flowing backwards in the opposite direction.  A backflow preventer is like a one-way gate for water.  Most backflow preventers are used to keep unsafe water from reversing flow and entering the clean water supply.  Backflow preventers can be as simple as a single check valve that closes when water flow reverses.  Using a simple check valve as a backflow preventer might be considered the equivalent of a turnstile at a store entrance, it is not very reliable, even a small amount of effort will overcome it.  A more elaborate backflow preventer can be a co