Irrigation System Backflow Preventer: Safety Basics

Irrigation System Backflow Preventer: Safety Basics

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A backflow preventer is a critical safety component in any irrigation system, preventing contaminated water from flowing back into the potable water supply. There are three main types: atmospheric vacuum breakers (AVBs), double-check valve assemblies (DCVAs), and reduced-pressure zone devices (RPZ). AVBs are suitable for low-risk residential setups, while DCVAs offer higher protection for commercial use. Install the preventer near the water source, ensuring it remains above the highest sprinkler head to avoid siphoning. Regular maintenance—checking for leaks, testing valves, and replacing seals—ensures compliance with health codes. Neglecting backflow prevention can lead to waterborne contamination, making this part non-negotiable in any system.