BackflowNear Test-Due Reminder

Approved backflow testers in San Francisco, CA

51 backflow testing businesses work within 25 miles of San Francisco, 16 of them based in town. Every one is on the approved tester list of 13 water utilities.

51 businesses within 25 miles

Backflow testing companies near San Francisco

What the badges mean
✓ CA Utility-Approved Tester Verified On the city list
The company is on a water utility's own approved list (the second badge names the list). That is the utility's approval, not a state license, and it counts for that utility.
3 certified testers
How many certified testers the roster lists at this business.
★ 4.8 (25 reviews)
The Google rating, shown as Google reports it. It does not change the order.

Order is by our quality score, never by payment. How we verify listings.

Are you a backflow testing company near San Francisco? One sponsor per county, clearly labelled. Sponsor this county

Malcolm Plumbing & Mechanical

100/100
✓ CA Utility-Approved Tester Verified ★ 4.8 (54 reviews) 2 certified testersOn San Francisco authorized testers Backflow Testing

184 Mendell St, San Francisco, CA 94124 · 2 mi from San Francisco

Call (415) 621-1985 Details Website
Verified Oct 2026 · Unclaimed listing

AAA Backflow Testing LLC

100/100
✓ CA Utility-Approved Tester Verified ★ 5 (3 reviews) 2 certified testersOn San Francisco authorized testers Backflow Testing

3450 Sacramento St #357, San Francisco, CA 94118 · 3 mi from San Francisco

Call (415) 535-1332 Details Website
Verified Oct 2026 · Unclaimed listing

Flow Masters Plumbing

100/100
✓ CA Utility-Approved Tester Verified ★ 5 (712 reviews) 2 certified testersOn San Francisco authorized testers Backflow Testing

6169 Mission St, Daly City, CA 94014 · 4 mi from San Francisco

Call (415) 751-1933 Details Website
Verified Oct 2026 · Unclaimed listing

1 Backflow Plumbing

100/100
✓ CA Utility-Approved Tester Verified ★ 5 (155 reviews) 3 certified testersOn San Francisco authorized testersOn City of Palo Alto list Backflow Testing

5635 Anza St #3, San Francisco, CA 94121 · 6 mi from San Francisco

Call (415) 913-8941 Details Website
Verified Oct 2026 · Unclaimed listing

Ayoob & Peery Plumbing Co.

90/100
✓ CA Utility-Approved Tester Verified ★ 3.9 (7 reviews) On San Francisco authorized testers Backflow Testing

975 Indiana St, San Francisco, CA 94107 · under 1 mile from San Francisco

Call (415) 550-0975 Details Website
Verified Oct 2026 · Unclaimed listing

Ros Plumbing

90/100
✓ CA Utility-Approved Tester Verified ★ 5 (4 reviews) On San Francisco authorized testers Backflow Testing

102 Bradford St, San Francisco, CA 94110 · 1 mi from San Francisco

Call (415) 505-2180 Details Website
Verified Oct 2026 · Unclaimed listing

Ace Plumbing & Rooter

90/100
✓ CA Utility-Approved Tester Verified ★ 4.9 (1179 reviews) On San Francisco authorized testers Backflow Testing

1090 Bryant St, San Francisco, CA 94103 · 1 mi from San Francisco

Call (415) 824-6333 Details Website
Verified Oct 2026 · Unclaimed listing

Cornely Company

90/100
✓ CA Utility-Approved Tester Verified ★ 5 (3 reviews) On San Francisco authorized testers Backflow Testing

65 Dorman Ave, San Francisco, CA 94124 · 1 mi from San Francisco

Call (415) 252-1800 Details Website
Verified Oct 2026 · Unclaimed listing

Arch Plumbing Inc

90/100
✓ CA Utility-Approved Tester Verified ★ 4.9 (305 reviews) On San Francisco authorized testers Backflow Testing

121 Quint St Ste 5E, San Francisco, CA 94124 · 1 mi from San Francisco

Call (415) 375-0302 Details Website
Verified Oct 2026 · Unclaimed listing

C & L Plumbing Inc

90/100
✓ CA Utility-Approved Tester Verified ★ 4.6 (11 reviews) On San Francisco authorized testers Backflow Testing

1516 Moraga St, San Francisco, CA 94122 · 4 mi from San Francisco

Call (415) 816-0936 Details Website
Verified Oct 2026 · Unclaimed listing

Steve Gotelli Plumbing Inc

90/100
✓ CA Utility-Approved Tester Verified 2 certified testersOn San Francisco authorized testersOn City of Palo Alto list Backflow Testing

100 N Hill Dr #44, Brisbane, CA 94005 · 4 mi from San Francisco

Call (415) 468-8880 Details
Verified Oct 2026 · Unclaimed listing

In and Out Plumbing

90/100
✓ CA Utility-Approved Tester Verified ★ 4.4 (167 reviews) On San Francisco authorized testers Backflow Testing

184 Harbor Wy, South San Francisco, CA 94080 · 7 mi from San Francisco

Call (650) 750-9595 Details Website
Verified Oct 2026 · Unclaimed listing

Pribuss Engineering

90/100
✓ CA Utility-Approved Tester Verified ★ 4.1 (7 reviews) On EBMUD listOn San Francisco authorized testersOn City of Palo Alto list Backflow Testing

523 Mayfair Ave, South San Francisco, CA 94080 · 7 mi from San Francisco

Call (650) 588-0447 Details Website
Verified Oct 2026 · Unclaimed listing

The Backflow Pro, Inc.

90/100
✓ CA Utility-Approved Tester Verified On EBMUD listOn San Francisco authorized testersOn City of Napa listOn DSRSD listOn City of Pleasanton listOn City of Lathrop listOn City of Milpitas listOn Alameda County Water District listOn North Marin Water District listOn City of Palo Alto listOn City of Tracy listOn City of Petaluma list Backflow Testing

360 Grand Ave #153, Oakland, CA 94610 · 9 mi from San Francisco

Call (800) 511-2210 Details Website
Verified Oct 2026 · Unclaimed listing

L J Kruse Company

90/100
✓ CA Utility-Approved Tester Verified ★ 4.9 (327 reviews) On EBMUD listOn San Francisco authorized testersOn Alameda County Water District list Backflow Testing

920 Pardee St, Berkeley, CA 94710 · 9 mi from San Francisco

Call (510) 644-0260 Details Website
Verified Oct 2026 · Unclaimed listing

Pacific Automatic Sprinkler Co.

80/100
✓ CA Utility-Approved Tester Verified ★ 1 (3 reviews) On San Francisco authorized testers Backflow Testing

2601 Harrison St, San Francisco, CA 94110 · under 1 mile from San Francisco

Call (415) 254-3076 Details
Verified Oct 2026 · Unclaimed listing

Southwood Plumbing

80/100
✓ CA Utility-Approved Tester Verified ★ 5 (8 reviews) On San Francisco authorized testers Backflow Testing

1059 San Mateo Ave, San Bruno, CA 94066 · 8 mi from San Francisco

Call (650) 756-5325 Details
Verified Oct 2026 · Unclaimed listing

Caccia Home Services

100/100
✓ CA Utility-Approved Tester Verified ★ 4.9 (2182 reviews) 2 certified testersOn City of Palo Alto list Backflow Testing

1660 Gilbreth Rd, Burlingame, CA 94010 · 11 mi from San Francisco

Call (650) 342-5363 Details Website
Verified Oct 2026 · Unclaimed listing

Skaates Inc.

90/100
✓ CA Utility-Approved Tester Verified ★ 3.5 (10 reviews) On San Francisco authorized testersOn City of Palo Alto list Backflow Testing

1461 Rollins Rd, Burlingame, CA 94010 · 12 mi from San Francisco

Call (650) 347-1794 Details Website
Verified Oct 2026 · Unclaimed listing

Carrier Commercial Svcs

90/100
✓ CA Utility-Approved Tester Verified ★ 1.8 (5 reviews) On EBMUD listOn San Francisco authorized testers Backflow Testing

600 McCormick St B, San Leandro, CA 94577 · 12 mi from San Francisco

Call (510) 347-2000 Details Website
Verified Oct 2026 · Unclaimed listing

Price reports

What a backflow test costs in San Francisco

Not enough reports yet for San Francisco to show a range. Be one of the first: it takes a minute and stays anonymous.

Published prices nationwide

$29.99 to $100 per assembly

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.

Had your backflow test done? Share what you paid to see local prices.

Metro guide: Backflow testing in Oakland and San Francisco: every utility's rules, filing portals and published prices in one place.

San Francisco Public Utilities Commission: backflow test rules

  • Who must test. Properties with a potential cross-connection, such as boilers, chemical feed equipment, dedicated irrigation, interconnected fire sprinklers or buildings four stories or taller, must install an approved assembly and test it at least once a year. Source.
  • Notices and deadlines. New assemblies are tested right after installation; after that, the Water Quality Division sends a notice when the annual test is due. Source.
  • How the report is filed. Testers submit results electronically through CCAMS within five business days of the test; a failed assembly that cannot be repaired the same day is entered on the day of the test. Source.
  • Tester registration. All testing must be done by an Authorized Backflow Prevention Assembly Tester permitted by the San Francisco Department of Public Health. Source.
  • Approved testers. The program page links a list of companies employing authorized testers, hosted on sf.gov. Source.

Everything about San Francisco Public Utilities Commission's backflow program

Never miss your annual backflow test

Most water utilities require the backflow assembly on an irrigation, fire or commercial line to be tested every year, and a missed test can mean a shutoff notice. Tell us when yours was last tested in San Francisco and we'll text you a month before it is due, with certified local testers ready to book.

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Backflow testing questions in San Francisco

Where are the backflow testing businesses listed for San Francisco based?

51 backflow testing businesses are listed within 25 miles of San Francisco. 16 are based in San Francisco itself, 19 more within 15 miles and 16 further out, up to 25 miles away. Other towns with more than one listing: San Leandro (4), Hayward (3) and San Rafael (3). The closest is Pacific Automatic Sprinkler Co., under 1 mile from San Francisco.

Which tester lists are the businesses near San Francisco on?

Every one is on the approved tester list of 13 water utilities.

Which water utility sets the backflow test rules in San Francisco?

San Francisco Public Utilities Commission. Who must test: Properties with a potential cross-connection, such as boilers, chemical feed equipment, dedicated irrigation, interconnected fire sprinklers or buildings four stories or taller, must install an approved assembly and test it at least once a year.

How many of the backflow testing businesses near San Francisco have Google reviews?

40 of the 51 listed for San Francisco have 3 or more Google reviews. Caccia Home Services has the most reviews, 2,182, with an average of 4.9 stars, as Google showed them at our last check.

Approved list: City of San Diego approved backflow testers, City of San Diego Public Utilities Department.

Approved list: Sweetwater Authority certified backflow testers, Sweetwater Authority.

Approved list: Cucamonga Valley Water District backflow assembly testers list, Cucamonga Valley Water District.

Approved list: Otay Water District approved backflow prevention assembly testers, Otay Water District.

Approved list: EVMWD backflow tester list, Elsinore Valley Municipal Water District.

Approved list: Ventura County certified backflow device tester list, County of Ventura Resource Management Agency.

Approved list: Yorba Linda Water District backflow prevention device testers, Yorba Linda Water District.

Approved list: Riverside Public Utilities backflow tester list, Riverside Public Utilities.

Approved list: City of Redlands backflow tester list (BSI), City of Redlands Municipal Utilities.

Approved list: Western Municipal Water District certified backflow prevention testers, Western Municipal Water District.

Approved list: Rancho California Water District approved backflow testers, Rancho California Water District.

Approved list: Sacramento County certified backflow prevention assembly testers, Sacramento County Environmental Management Department.

Approved list: Olivenhain Municipal Water District certified backflow prevention assembly testers, Olivenhain Municipal Water District.

Approved list: EBMUD approved backflow testers, East Bay Municipal Utility District.

Approved list: Irvine Ranch Water District backflow tester list, Irvine Ranch Water District.

Approved list: San Francisco authorized backflow assembly testing companies, San Francisco Department of Public Health.

Approved list: Padre Dam Municipal Water District approved backflow tester list, Padre Dam Municipal Water District.

Approved list: DSRSD backflow tester list, Dublin San Ramon Services District.

Approved list: City of Palo Alto approved backflow testers, City of Palo Alto Utilities.

Approved list: City of Pleasanton approved backflow prevention testers, City of Pleasanton Water.

Approved list: Certified Backflow Prevention Device Testers, Los Angeles County Public Health.

Approved list: Casitas Municipal Water District approved certified backflow device testers, Casitas Municipal Water District.

Approved list: City of Milpitas qualified backflow prevention assembly testers, City of Milpitas.

Approved list: City of Tracy approved backflow testers, City of Tracy Public Works.

Approved list: City of Long Beach backflow prevention testers, Long Beach Health.

Approved list: City of Ceres certified backflow tester list, City of Ceres.

Approved list: City of Petaluma city certified backflow testers, City of Petaluma.

Approved list: City of Clovis certified backflow testers, City of Clovis Public Utilities.

Approved list: Goleta Water District certified backflow tester listing, Goleta Water District.

Approved list: City of Napa certified backflow prevention testers, City of Napa Utilities.

Approved list: La Puente Valley County Water District approved list of backflow testers, La Puente Valley County Water District.

Approved list: Alameda County Water District approved backflow prevention testers, Alameda County Water District.

Approved list: West Valley Water District backflow tester list, West Valley Water District.

Approved list: Rainbow Municipal Water District certified backflow vendor list, Rainbow Municipal Water District.

Approved list: City of Lathrop approved backflow testers, City of Lathrop Public Works.

Approved list: North Marin Water District backflow assembly tester list, North Marin Water District.

Approved list: Calaveras County Water District recognized BPA testers, Calaveras County Water District.

Approved list: Diablo Water District list of certified backflow testers, Diablo Water District.

Approved list: Forestville Water District approved certified backflow device testers, Forestville Water District.

Related site: Testing a fire line? The sprinkler system behind it needs its own inspections by a state-licensed fire protection company. Licensed fire sprinkler inspectors near San Francisco on FireInspectorNear, our sister directory.

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