Rivers Edge Plumbing & Heating
100/100 ✓ ND Certified Backflow Tester Verified ★ 4.9 (217 reviews) 2 certified testersOn ND Plumbing Board certified Backflow Testing
Verified Oct 2026 · Unclaimed listing
Backflow testing companies in North Dakota
From the North Dakota State Plumbing Board's public list of certified backflow assembly testers, read October 6, 2026. We list the testing companies on it whose phones match their Google profiles.
16 companies on the utility list
8 listed here, phones checked on Google
The lists we use in North Dakota
- North Dakota State Plumbing Board certified backflow assembly testers, North Dakota State Plumbing Board: 16 companies based in North Dakota, as of October 6, 2026.
This is the state board's own list of certified testers.
Backflow testing businesses in North Dakota
Ranked by our quality score: on the utility's current list, a phone that matches the business's Google profile, and a website. Nobody can pay to move up.
What the badges mean
- ✓ ND Utility-Approved Tester Verified On the city list
- The company is on a water utility's own approved list (the second badge names the list). That is the utility's approval, not a state license, and it counts for that utility.
- 3 certified testers
- How many certified testers the roster lists at this business.
- ★ 4.8 (25 reviews)
- The Google rating, shown as Google reports it. It does not change the order.
Order is by our quality score, never by payment. How we verify listings.
Legend-Air
90/100 ✓ ND Certified Backflow Tester Verified ★ 4.9 (413 reviews) On ND Plumbing Board certified Backflow Testing
Verified Oct 2026 · Unclaimed listing
Lawn King ND
90/100 ✓ ND Certified Backflow Tester Verified ★ 4.1 (54 reviews) On ND Plumbing Board certified Backflow Testing
Verified Oct 2026 · Unclaimed listing
Wright Plumbing
90/100 ✓ ND Certified Backflow Tester Verified ★ 5 (39 reviews) On ND Plumbing Board certified Backflow Testing
Verified Oct 2026 · Unclaimed listing
Economy Plumbing
90/100 ✓ ND Certified Backflow Tester Verified ★ 4.5 (29 reviews) On ND Plumbing Board certified Backflow Testing
Verified Oct 2026 · Unclaimed listing
Manning Mechanical
90/100 ✓ ND Certified Backflow Tester Verified ★ 4.6 (9 reviews) On ND Plumbing Board certified Backflow Testing
Verified Oct 2026 · Unclaimed listing
Mission Mechanical
90/100 ✓ ND Certified Backflow Tester Verified ★ 3.7 (7 reviews) On ND Plumbing Board certified Backflow Testing
Verified Oct 2026 · Unclaimed listing
BDT Mechanical
80/100 ✓ ND Certified Backflow Tester Verified ★ 4.3 (12 reviews) On ND Plumbing Board certified Backflow Testing
Verified Oct 2026 · Unclaimed listing
Towns with approved testing companies
Questions
Where do these North Dakota backflow testing companies come from?
From the North Dakota State Plumbing Board's public list of certified backflow assembly testers, read October 6, 2026. We list the companies on it whose phones match their Google profiles.
Who is allowed to test a backflow preventer in North Dakota?
A tester certified as North Dakota's rules require, and usually one your water utility accepts. Your utility notice names the requirement. Ask any company for the tester's certificate number before the test.
How often does a backflow assembly need testing?
Most water utilities require testable backflow assemblies to be tested at installation and then every year. Your utility's notice gives your deadline and how the report is filed.
Never miss your annual backflow test
Most water utilities require the backflow assembly on an irrigation, fire or commercial line to be tested every year, and a missed test can mean a shutoff notice. Tell us when yours was last tested and we'll text you a month before it is due, with certified local testers ready to book.
Free. One text before your test is due. No spam, cancel anytime. Privacy