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Backflow Tester (own route)

one-week certification × a legally required yearly test × repeat customers

Every building with a backflow preventer — most commercial buildings, many homes with irrigation or fire sprinklers — has to have it tested every year by a certified tester, and the report goes to the water utility. The test takes 15–30 minutes and pays $75–250 for a home and $150–400+ for a commercial assembly. Because it is required every year, a customer you get once comes back on their own. Employed testers make about $38–76k; testers with their own route build a repeat-customer business that can reach around $100k gross. Plumbers and irrigation techs often add it on the side.

Method

  1. Check your state's rulesSome states only need a course and exam; ASSE 5110 also asks for five years of related trade experience.
  2. Take the 40-hour course and examWritten plus hands-on testing of real assemblies.
  3. Buy and calibrate a test kitMembers step
  4. Register with utilities and build a routeMembers step
The rest of this method is a Members guide

You've got the way in. Members guides cover the next 2 steps and every skill level this method needs: how long each takes, what it costs, and what it pays along the way.

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Watch out:Rules differ a lot by state, and some require years of plumbing or irrigation experience first. The route takes time to build, and you need liability insurance. The $100k figure is gross revenue at about 1,000 tests a year, not take-home.

Pay, licensing and demand vary by state, city and timing. Figures are averaged and partly approximate. Skill levels follow each skill's milestones (see Skills). Sources: ASSE 5110 backflow tester certification requirements; TEEX 40-hour Backflow Prevention Assembly Tester course (Texas); findbackflowtesters.com testing cost guide (2026); ZipRecruiter backflow tester pay (Sep 2026); r/skilledtrades mention, Oct 2026. Something off? Suggest a fix