McLean & Williams, Inc, Napa, CA: Backflow Testing

Approvals

✓ On the City of Napa list Phone matches its Google profile

City of Napa certified backflow prevention testers, as of August 26, 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.

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 (707) 255-6450 Visit website More testers in California

Price reports

What a backflow test costs in Napa

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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 McLean & Williams, Inc

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

Other backflow testers nearby

Business	Services	Distance
All Star Plumbing	Backflow Testing	3 mi
Heritage Systems Inc	Backflow Testing	6 mi
Cagwin & Dorward	Backflow Testing	18 mi
Arolo Company Inc	Backflow Testing	19 mi
Scott Cramer Plumbing	Backflow Testing	19 mi
Ongaro & Sons	Backflow Testing	20 mi

Questions about McLean & Williams, Inc

Is McLean & Williams, Inc approved to test backflow assemblies?

McLean & Williams, Inc is on the City of Napa list, as of August 26, 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 McLean & Williams, Inc do?

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

What areas does McLean & Williams, Inc serve?

They are based in Napa, California, within driving distance of Napa, Petaluma, Hercules, Santa Rosa, Martinez. Service areas are set by the business, so confirm yours when you call.

How do I reach McLean & Williams, Inc?

Call (707) 255-6450. Their website is linked on this page.

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

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