Check valve installation must always be performed by a licensed and certified backflow testing company, as per state and federal law.  For those uninformed, there is no wiggle-room in this statement. Check valves guarantee that your water will flow in the correct direction, and should backflow, or flow-reversal occur, the check valve is designed to

In order to explain what backflow testing is, we first must understand what backflow is. Backflow is the flow of water in reverse caused by reduced water pressure or loss of water pressure from the water supplier.  In simpler terms, backflow occurs when water flows away from a building rather than towards a building. Most