| Quick facts | Answer |
|---|---|
| Cost range | Average about $165 per device; typical range $30 to $300 |
| Time | The test itself takes about 20 minutes |
| Who's qualified | Look for ABPA or ASSE tester certification and a plumbing license |
Why do the quotes differ so much?
Device type is a major driver, since RPZ assemblies generally cost more to test than double check valve assemblies. Hard-to-reach devices also take more labor, because Oklahoma code requires backflow preventers to be serviceable. Many quotes also include travel, scheduling, paperwork, and a minimum service charge, not just test time.
What should I do this week?
Confirm which device type is installed on your line before comparing quotes. Ask each bidder whether the quote covers the test, travel, and report filing. Book the test soon, because Oklahoma rules require testing at installation, after repairs or relocation, and every year after that.
What should I check before hiring?
Ask for proof of current Oklahoma backflow tester certification and an active state plumbing license. Oklahoma has no statewide backflow tester license, so each city sets its own rules. Ask whether the bidder is on the local utility's accepted list before you book.
What does the test equipment cost you?
Oklahoma code says test equipment, materials, and labor are furnished by the permittee. That means a quote should state whether these costs are included. A low price that leaves them out may cost more once added later.
What to do next
- Ask each of your three bidders for the device type and whether the quote includes the test, travel, and city report filing.
- Ask each tester for their current ABPA or ASSE certification and Oklahoma plumbing license number, then verify them.
- Check that the tester appears on the local utility's accepted list before you book.
- Schedule the annual test on time, since Oklahoma requires yearly testing for these assemblies.
- 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.




