California contractor license
BACKFLOW PREVENTION SPECIALISTS INC
- B General Building
- C16 Fire Protection
- C20 Warm-Air Heating, Ventilating And Air-Conditioning
- C36 Plumbing
- C43 Sheet Metal
BACKFLOW PREVENTION SPECIALISTS INC is a contractor with 5 license classifications, including B General Building and C16 Fire Protection, in Sunnyvale, Santa Clara County, licensed in California for 44 years (since 1982). As of Jan 2, 2026, the license is active with an expiration date of Sep 30, 2026 on record and a license bond is on file.
BACKFLOW PREVENTION SPECIALISTS INCB General Building · C16 Fire Protection · C20 Warm-Air Heating, Ventilating And Air-Conditioning · C36 Plumbing · C43 Sheet Metal · checked Jan 2, 2026
ActiveLicense number#427328
Licensed sinceSep 7, 1982
Years licensed44 years
Expiration on recordSep 30, 2026
City and countySunnyvale, Santa Clara County
License bondOn file
ProjectsNone on file
Full record
Insurance, workers' comp, violations and permits.
Workers' comp, insurance policies, violations and full permit historyFree with your email. Shown on this page after you unlock.
LockedWorkers' compUnlock to view
Insurance policiesUnlock to view
Violations, complaints and disciplinary actionsUnlock to view
Full permit historyUnlock to view
5 free unlocks left today
Is this your business? Claim it free.
Claim your free profile to help keep your business details accurate. We'll verify you first.
Source: California Contractors State License Board (CSLB) and City of Los Angeles permit records. Last updated Jan 2, 2026.