A RPZ Valve, also known as a Reduced Pressure Zone Valve Assembly, is used to protect against back siphonage and back pressure, situations which can cause contaminated water from reaching the public potable water supply. They are called a number of names including backflow valve, backwater valve as well as backflow preventer, but no matter

Back flow preventors are those devices specifically designed to prevent the harmful effects of backflow and back-siphonage. To understand better how a back flow preventor works, one must first understand the nature of back flow. Back flow generally occurs when there is a sudden drop in water pressure from the main water supply to a

What is a back flow preventor? It is exactly what its name implies, a device which prevents back flow.  Seems fairly straightforward, doesn’t it, unless you don’t know what backflow is, in which case it sounds like Ancient Greek. So let’s start with backflow.  Backflow occurs when the water in your pipes reverses direction and