A 2 inch backflow preventer is a 2-inch bronze double check backflow device with two brass ball valves for easy shut-off and four ball valve test cocks. It is used to stop the flow of contaminated water should it reverse direction in a situation referred to as backflow. The backflow preventer keeps the water from

It hasn’t been all that long ago that a residential backflow preventer wasn’t required in city neighborhoods.  The main concern over backflow, it was believed, came from industrial and commercial facilities and not, it was believed, from residential homes. Then chlordane was siphoned through a hose at a residence in Roanoke, Virginia, contaminating the water

The Wilkins RPZ is designed for installation on potable water supply lines to prevent against the backflow of polluted water from a home or business back into the potable water supply.  This backflow preventer is supplied with a full port all valve and, for indoor installation, an air gap adapter. The housing is made of