What is the purpose of a Reduced Pressure Principle Backflow Preventer?

The purpose of a Reduced Pressure Principle Backflow Preventer is to prevent backflow and maintain water pressure integrity. This device is specifically designed to protect the potable water supply from contamination that can occur when there is a drop in pressure in the distribution system, causing non-potable water to potentially flow back into the main water supply.

The device consists of two check valves separated by a pressure differential relief valve. This arrangement allows the backflow preventer to function effectively by ensuring that if the pressure downstream drops below the pressure on the supply side, the relief valve opens to divert any contaminated water away from the safe water supply. Thus, it is crucial in maintaining safe drinking water standards by preventing the reverse flow of water.

Other choices, such as improving water quality through filtration, monitoring flow rates, or heating water, do not describe the function of a backflow preventer. Those processes involve different types of equipment and systems that serve specific roles outside of backflow prevention.