A 1 Backflow Preventer is a double-check valve assembly designed to prevent dangerous and contaminated backflow of polluted water from entering into the potable water supply. This can happen due to backpressure or back-siphonage. A 1 backflow preventer is generally made of bronze construction, test cocks, and valve shutoffs to insure that your water flows
A back flow preventer, otherwise known as a backflow preventer device, is used to protect the city water supply from contamination caused by a situation called backflow. To understand how a back flow preventer works, one must first understand the nature of backflow. Water reaches your home by the use of water pressure. The pressure