Backflow Guides

Straight answers from certified backflow testers.

Short guides written by our testers, covering the questions we hear most on the phone.

All guides

A step-by-step guide to the annual notice from your water district: what it means, deadlines, and how to get compliant fast.

How backflow happens, how the main assembly types stop it, and why California requires annual testing.

Side-by-side comparison of the common assembly types, the hazards each is approved for, and installation rules.

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