What causes a backflow device to fail testing?

Common reasons for failure

A backflow device can fail testing for several practical reasons, even if it still looks normal from the outside. Wear and tear, mineral buildup, debris inside the valve, damaged internal parts, and pressure-related issues can all affect how well it protects your drinking water.

• Worn seals or springs that no longer close properly
• Dirt or sediment blocking valves from seating
• Leaking components caused by age or corrosion
• Improper pressure conditions in the irrigation or plumbing system
• Freeze damage or physical damage to the unit

If a device fails, it usually needs repair or replacement before it can pass again. Dallas Landscape & Irrigation can inspect the system, identify the issue, and help restore proper operation so your property stays protected and code-compliant.

If you think your device may be at risk of failing, request an estimate from Dallas Landscape & Irrigation.