BACKFLOW PREVENTION SPECIALISTS INC
California contractor license #427328 · Sunnyvale, Santa Clara County
License
- License number
- 427328
- Status
- Clear
- Classifications
- B General Building Contractor
- C-16 Fire Protection Contractor
- C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor
- C-36 Plumbing Contractor
- C-43 Sheet Metal Contractor
- Business type
- Corporation
- Issued
- Sep 7, 1982
- Expires
- Sep 30, 2028
- Workers' compensation
- Workers' Compensation Insurance — Republic Indemnity Company Of America
- Contractor's bond
- $25,000 — Ohio Casualty Insurance Company (The)
- DIR public works registration
- Registered through Jun 30, 2027
From the California Contractors State License Board (CSLB) public license file, last updated Sep 11, 2026. Verify license #427328 on CSLB's License Check.
California public works
BACKFLOW PREVENTION SPECIALISTS INC appears on 50 public works projects registered with the California Department of Industrial Relations, 11 of them as the prime contractor, for 38 awarding bodies between 2016 and 2026. Projects it led total $415,492 in reported contract value.
| Date | Project | Awarding body | Role | Contract amount |
|---|---|---|---|---|
| Aug 17, 2026 | FY26-27 WATER CROSS-CONNECTION TESTINGWater | City of Mountain View | Prime | $60,000 |
| Aug 13, 2026 | Backflow TestingPlumbing & restrooms | Alameda Unified School District | Prime | $30,000 |
| Jun 22, 2026 | Cross Connection Control Program SupportOther | Santa Clara Valley Water District - CCSU | Prime | $50,000 |
| Jun 1, 2026 | outh Base Fire Assembly Back Flow PrevenPlumbing & restrooms | San Mateo County Transit District | Prime | $149,000 |
| Mar 16, 2026 | East Santa Clara Senior HousingOther | Eden Housing, Inc | Subcontractor | $36,000,000 |
| Feb 2, 2026 | Mountain View Lot 12Buildings & facilities | MV Lot 12 Housing Partners, L.P. | Subcontractor | $78,600,000 |
| Jan 21, 2026 | BackflowPlumbing & restrooms | Sare-Regis Management Co., LP | Prime | $3,010 |
| Oct 29, 2025 | 831 Water StreetPaving & streets | 831 Water Street, LP | Subcontractor | $56,534,802 |
| Aug 26, 2025 | 2025 BACKFLOW REPAIRSPlumbing & restrooms | Santa Clara Valley Open Space Authority | Subcontractor | $22,702 |
| Aug 19, 2025 | FY25-26 RC H2O CROSSCONNECT CTRL TESTINGWater | City of Mountain View | Prime | $60,000 |
| Jul 22, 2025 | K-170 FACILTIESPlumbing & restrooms | Santa Clara Valley Open Space Authority | Prime | $2,172 |
| Jul 1, 2025 | Backflow Prevention ServicesPlumbing & restrooms | Alameda Unified School District | Prime | $30,000 |
| Jan 30, 2025 | RECYCLED WATER CROSS CONNECTION VISUAL IWater | City of San Jose, Purchasing Dept | Prime | $3,300 |
| Jan 29, 2025 | Annual BackflowPlumbing & restrooms | Sare-Regis Management Co., LP | Prime | $3,010 |
| Jan 29, 2025 | Regional Street ApartmentsPaving & streets | Regional Street Investors, L.P. | Subcontractor | $47,513,677 |
| Dec 17, 2024 | EVC M&O Shops BuildingBuildings & facilities | San Jose-Evergreen Community College District | Subcontractor | $13,958,319 |
| Nov 18, 2024 | Midway Village Phase 2Buildings & facilities | MP Midway Associates 2 L.P. | Subcontractor | $84,995,782 |
| Nov 4, 2024 | Cabrillo College Student Housing P3Other | Cabrillo College | Subcontractor | $131,842,863 |
| Nov 1, 2024 | Pacific Avenue Senior HomesOther | Pac Avenue, L.P. | Subcontractor | $32,145,637 |
| Oct 2, 2024 | Hill StreetPaving & streets | Linc Housing Corporation | Subcontractor | $25,890,000 |
| Sep 16, 2024 | Plumbing and Backflow Assembly Testing,Plumbing & restrooms | Alameda Unified School District | Prime | $25,000 |
| Jul 16, 2024 | Forest ParkParks, landscape & fields | City of Dublin | Subcontractor | $2,197,000 |
| Jul 1, 2024 | MTMCONSTRUCTFY25MA17Other | County of Ventura GSA | Subcontractor | $5,984,222 |
| Jun 17, 2024 | San Rafael High School Aquatic Center PrBuildings & facilities | San Rafael City Schools | Subcontractor | — |
| May 21, 2024 | 11921.66- D/B For West Field UtilityPaving & streets | San Francisco International Airport Commission | Subcontractor | $12,000,000 |
Most recent 25 of 50. Contract amounts are the whole project's, as the awarding body reported them to DIR (reported since July 2024); a role is "Prime" when the awarding body registered the contractor on the project.
Awarding bodies it works for most
- Alameda Unified School District · 4 projects
- City of Mountain View · 3 projects
- City of San Jose · 3 projects
- San Francisco International Airport Commission · 2 projects
- Sare-Regis Management Co., LP · 2 projects
- City of Dublin · 2 projects
- Santa Clara Valley Open Space Authority · 2 projects
- Department of General Services · 2 projects
- Eden Housing, Inc · 1 project
- San Jose-Evergreen Community College District · 1 project
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