Thornton & Son LLC., Youngstown, OH: Backflow Testing

Approvals

✓ On the Trumbull County Health list Phone matches its Google profile

Trumbull County Combined Health District plumbers certified to test backflow devices, as of February 2, 2026. Being on this list means the utility lets the company file backflow test reports in its water system; it is not a state license.

Certified tester	Certificate
James Thornton

Ask for the certificate number of the tester who will do your test, and check that your own water utility accepts reports from this company.

Call (330) 793-9768 More testers in Ohio

Price reports

What a backflow test costs in Youngstown

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Published prices nationwide

$29.99 to $100 per assembly

$0$25$50$75$100$125

Based on 14 published prices · Read Oct 2026 Prices testing businesses list on their own websites, from our cost guide. Listed prices, not what people paid.

Every published price, with its source: what a backflow test costs.

Failed test? Published repair, rebuild and replacement prices: what a backflow repair or replacement costs.

Where you will find Thornton & Son LLC.

These are the city pages close enough for this business to appear on.

Youngstown, OH(3 mi)
Warren, OH(11 mi)

Other backflow testers nearby

Business	Services	Distance
Timlin Plumbing & Heating	Backflow Testing	4 mi
Thacker Plumbing/Heating	Backflow Testing	4 mi
Adam-EVE Plumbing & Drain	Backflow Testing	5 mi
The Neff Company, Inc.	Backflow Testing	7 mi
Anchor Plumbing & Drain	Backflow Testing	9 mi
AK Waterworks LLC.	Backflow Testing	10 mi

Questions about Thornton & Son LLC.

Is Thornton & Son LLC. approved to test backflow assemblies?

Thornton & Son LLC. is on the Trumbull County Health list, as of February 2, 2026. That means the utility lets the company file backflow test reports in its system; it is not a state license. Ask for the tester's certificate number before the test.

What does Thornton & Son LLC. do?

Their listing covers backflow testing. Call to confirm the service you need, because offerings change.

What areas does Thornton & Son LLC. serve?

They are based in Youngstown, Ohio, within driving distance of Youngstown, Warren. Service areas are set by the business, so confirm yours when you call.

How do I reach Thornton & Son LLC.?

Call (330) 793-9768.

Compiled from public records and public business information. Not an endorsement. Check licensing before you hire.

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