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Tagged irrigation system

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

04/21/2016

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