| Quick facts | Answer |
|---|---|
| Cost range | $75–$150 residential; $125–$250 commercial |
| Time | About 20–30 minutes per assembly |
| Who's qualified | ABPA or ASSE certification, plus the CIB plumbing license where applicable |
Owasso, OK: what's different here
Owasso sits about 14 miles from Tulsa, roughly a 19-minute drive up US-169. Tulsa's climate brings hot, humid summers and cold winters, with a mean first 28°F hard freeze on November 14 and a mean last one on March 17. That freeze window makes seasonal shutdown timing a real factor for outdoor double check valve assemblies. Local water authorities commonly require annual testing and reporting for every backflow prevention assembly.
How often is double check valve testing required in Owasso?
Oklahoma's adopted plumbing code calls for backflow testing at installation, after repair or relocation, and at least once a year. Annual testing and compliance reporting for all backflow prevention assemblies is standard across Oklahoma's service market. If you have a lawn irrigation system, City of Tulsa guidance says the backflow preventer should be tested annually by a qualified professional.
Who is qualified to test backflow assemblies in Owasso?
Oklahoma has no statewide backflow tester license. Cities and rural water districts approve testers, and most require ABPA or ASSE certification plus the CIB plumbing license where applicable. You can check active tester licenses on the Oklahoma Corporation Commission Petroleum Storage Tank Division's licensed tester list, which shows licenses through 2026.
What happens during a double check valve test?
A certified backflow tester inspects the assembly, runs differential pressure tests, and files compliance reports with the local water authority. A double check valve assembly test typically takes about 20–30 minutes. For new meter installations, City of Tulsa specs require testing by a City-approved tester before acceptance.
When should Owasso homes schedule winterization for backflow assemblies?
Tulsa's mean first 28°F hard freeze is November 14 and the mean last is March 17, with a mean of 241 days between hard freezes. The first 32°F frost averages November 3. Hot, humid summers and cold winters make freeze protection and seasonal shutdown timing matter for outdoor assemblies.
What to do next
- Confirm your device is a double check valve assembly before requesting quotes, since residential testing typically runs $75–$150.
- Verify the tester's ABPA or ASSE certification and the CIB plumbing license where applicable, using the Oklahoma Corporation Commission Petroleum Storage Tank Division licensed tester list.
- Ask each quote to include filing the compliance report with your local water authority after the differential pressure test.
- Schedule before November 3, the mean first frost date, if your assembly needs winterization.
- Call (918) 202-2068 or email [email protected] for a free quote from a licensed, insured local backflow testers.
Tulsa Backflow is a free referral service: an independent contractor does the work and may pay us a referral fee. You never pay us anything.
