Backflow resources
Backflow, explained in plain English
Straight answers to the questions we hear every week from homeowners, HOA boards and property managers from Mount Vernon to Tacoma.
Guides
Start here
Test notices
Got a backflow test notice? What it means and what to do
What’s on the letter, why you got it, and how to handle it before the deadline.
Read the guide
Quick check
Do I need a backflow test?
Answer three questions and find out in 30 seconds, no sign-up needed.
Take the check
Requirements
Washington backflow testing requirements
Who needs a test, how often, who can do it, and what happens if you skip it.
Read the guide
Identify yours
RPBA vs. DCVA vs. PVB: which assembly do you have?
How each type works, where it’s required and how to tell them apart.
Read the guide
Failed test
Failed your backflow test? Here’s what happens next
Why assemblies fail, repair vs. replace, and how the retest and reporting work.
Read the guide
Seasonal
How to winterize your irrigation backflow preventer
A step-by-step fall checklist for Western Washington homeowners.
Read the guideGlossary
RPBA? BAT? Purveyor?
Backflow comes with a lot of acronyms. Our glossary explains every term you’ll see on a test notice, test report or quote.
Open the glossaryOfficial sources