What is a backflow preventer?

A backflow preventer is specifically designed to ensure that water flows in only one direction, preventing contaminated water from flowing back into the clean water supply. This is crucial for maintaining the safety and quality of drinking water, as backflow can occur due to a change in pressure in the supply system, potentially allowing harmful substances to enter the potable water source.

The primary function of a backflow preventer is to protect against situations where contaminated water from a source, such as irrigation systems or industrial processes, could contaminate the clean drinking water supply. This device ensures compliance with health standards and protects public health by ensuring that water remains uncontaminated.

In contrast, devices that increase water pressure, filter impurities, or measure water consumption serve different purposes and do not pertain to the prevention of backflow in a water system.