O.C. McDonald Co., San Jose, CA: Backflow Testing

Approvals

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

City of Milpitas qualified backflow prevention assembly testers, as of April 30, 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 (408) 295-2182 Visit website More testers in California

Price reports

What a backflow test costs in San Jose

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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.

What O.C. McDonald Co.'s website says

It says	Details	Page
24-hour service	Offered, it says	ocmcdonald.com
Founding year	Founded in 1906	ocmcdonald.com/about

Read on ocmcdonald.com on October 11, 2026 (2 pages). This is what the business says about itself.

Where you will find O.C. McDonald Co.

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

Other backflow testers nearby

Business	Services	Distance
Silicon Valley Home Services	Backflow Testing	under 1 mi
Flow City Plumbing	Backflow Testing	2 mi
Burr Plumbing and Pumping Inc	Backflow Testing	2 mi
Nickell Fire Protection Inc	Backflow Testing	2 mi
1-Hour Drain	Backflow Testing	3 mi
SV Plumbing Inc.	Backflow Testing	3 mi

Questions about O.C. McDonald Co.

Is O.C. McDonald Co. approved to test backflow assemblies?

O.C. McDonald Co. is on the City of Milpitas list, as of April 30, 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 O.C. McDonald Co. do?

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

What areas does O.C. McDonald Co. serve?

They are based in San Jose, California, within driving distance of San Jose, Sunnyvale, Morgan Hill, Pleasanton, Hayward. Service areas are set by the business, so confirm yours when you call.

How do I reach O.C. McDonald Co.?

Call (408) 295-2182. 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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