#1 Son Plumbing, Highland, CA: Backflow Testing

Approvals

✓ On the Riverside Public Utilities list✓ On the West Valley Water District list✓ On the Cucamonga Valley Water District list✓ On the City of Redlands list✓ On the Western Water list Phone matches its Google profile

Riverside Public Utilities backflow tester list, as of June 1, 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.
West Valley Water District backflow tester list, as of March 3, 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.
Cucamonga Valley Water District backflow assembly testers list, as of October 6, 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.
City of Redlands backflow tester list (BSI), as of August 1, 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.
Western Municipal Water District certified backflow prevention testers, as of October 7, 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 (909) 904-3774 Visit website More testers in California

What #1 Son Plumbing's website says

Services listed on #1 Son Plumbing's website, read October 11, 2026: backflow installation and replacement and general plumbing. 1sonplumbing.com

Read on 1sonplumbing.com on October 11, 2026 (2 pages). This is what the business says about itself.

Where you will find #1 Son Plumbing

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

Other backflow testers nearby

Business	Services	Distance
Basic Backflow	Backflow Testing	3 mi
ProCraft Construction	Backflow Testing	5 mi
Henry Bush Plumbing	Backflow Testing	5 mi
Redline Fire Protection Services, Inc	Backflow Testing	8 mi
J Adams AC, Heating, and Plumbing	Backflow Testing	10 mi
Leblanc Backflow Service	Backflow Testing	13 mi

Questions about #1 Son Plumbing

Is #1 Son Plumbing approved to test backflow assemblies?

#1 Son Plumbing is on the Riverside Public Utilities list and West Valley Water District list and Cucamonga Valley Water District list and City of Redlands list and Western Water list, as of June 1, 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 #1 Son Plumbing do?

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

What areas does #1 Son Plumbing serve?

They are based in Highland, California, within driving distance of Redlands, Riverside, Rancho Cucamonga, Norco, Corona. Service areas are set by the business, so confirm yours when you call.

How do I reach #1 Son Plumbing?

Call (909) 904-3774. 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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#1 Son Plumbing