Updated: Jan 14, 2026
Location and Projects
Address
1131 ELKO DRIVE, Sunnyvale, CA, 94089
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Backflow Prevention Specialists Plumber
Backflow Prevention Specialists Inc, 1131 Elko Dr, Sunnyvale, CA (Employees: Benjamin Charles Bennett and Carol Joseph Flynn) holds a Plumbing, General Building, Warm Air Heating, Ventilating And Air Conditioning, Fire Protection, Sheet Metal license and 2 other licenses according to the California license board.
Their BuildZoom score of 113 ranks in the top 3% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Backflow Prevention Specialists Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Backflow Prevention Specialists Inc Services
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Backflow Prevention Specialists Inc Contact Information
Phone Number: (800) 464-3569
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Address: 1131 ELKO DRIVE, Sunnyvale, CA 94089
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Backflow Prevention Specialists Inc Sunnyvale
Quality
113
97th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Backflow Prevention Specialists Inc has a BuildZoom score of 113, which places them above 97% of 336,931 contractors in California.
Activity
|
44 projects
|
2025 |
|
50 projects
|
2024 |
|
60 projects
|
2023 |
Our building permit records indicate that Backflow Prevention Specialists Inc has worked on at least
154.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
21 projects
|
Commercial Renovations |
|
148 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Backflow Prevention Specialists Inc mostly works on
plumbing project
and commercial renovation
projects.
Pricing
|
6 projects
|
< $5k |
|
36 projects
|
$5k-$20k |
|
5 projects
|
$20k-$50k |
|
1 project
|
$50k-$100k |
The typical size of their permits is approximately $12,842. This graph shows the distribution of these job values.
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
Building Permits by Backflow Prevention Specialists Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Heron bay hoa - replace one (1) 2” watts 009m2qt rp serial# a28655 with one (1) 2” lead free rp backflow prevention assembly on meter# 97394857 on the water service located at 15601 baypoint avenue
Valuation:
$6,414
Permit #:
BRPLUMB-25-0096
Status:
withdrawn
Fee:
$139
Permit Type:
Water service
Building Type:
N/A
Work category: 11p; removal of one (1) 1” watts 909 rp serial# 2416851 backflow prevention assembly on the 1st floor fountain make up water service located at 201 california street
Valuation:
N/A
Permit #:
PW20250521422
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace one (1) 2” febco 825y rp serial# t3418 with one (1) 2” lead free rp backflow prevention assembly on meter# 221387049 on the domestic water service
Valuation:
$9,565
Permit #:
BLD2025-07012
Status:
complete
Fee:
$1,078
Permit Type:
Alteration
Building Type:
N/A
Work category: 11p; replace one (1) 4” ames 3000 dcda serial# 0412f08 with one (1) 4” wilkins 350astdar dcda backflow prevention assembly on meter# 22211410
Valuation:
N/A
Permit #:
PW20250424789
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; replace one (1) 6 watts 909 rp serial# 253770 with one (1) 6 wilkins 375astr rp backflow prevention assembly on the domestic water service located in the basement mechanical room
Valuation:
N/A
Permit #:
PW20250922207
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; removal of one (1) 75” wilkins 720a pvb serial# g205335 safeway -low food prep next to produce sink removal of one (1) 75” febco 765 pvb serial# h165860 safeway -low food prep next to produce sink master address 2351 powell street
Valuation:
N/A
Permit #:
PW20240814876
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; removal of one (1) 75” watts 007 dc serial# 184206 - safeway. behind deli on chicken oven removal of one (1) 5” flowmetric z11 rp serial# f8609 - safeway under produce sink master address 2351 powell street sf
Valuation:
N/A
Permit #:
PW20240814870
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; obtain a permit for the installation of one (1) 3/4 wilkins 350 dc serial# w943722 backflow assembly on the fire water service located at 73 vandewater street
Valuation:
N/A
Permit #:
PW20250811239
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace one (1) 1.5” watts 909 rp with one (1) 1.5” lead free rp backflow assembly on meter# 231981320 on the water service
Valuation:
$5,199
Permit #:
BLD2025-06674
Status:
complete
Fee:
$654
Permit Type:
Other
Building Type:
N/A
Work category: 11p; 1- removal of on one (1) 2 007m1 serial# 09758 on the cooling tower. 2- removal of one (1) 1 1/4 lf009m2qt serial# 20143 on the roof. 3 - removal of one (1) 1 007m1qt serial# 93240 located on the rooftop
Valuation:
N/A
Permit #:
PW20240510712
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; obtain a permit for the installation of one (1) 1 febco 860 rp serial# ha24226 backflow assembly on the irrigation water service located at 2340 turk street
Valuation:
N/A
Permit #:
PW20250811241
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; replace one (1) 2 wilkins 950xl dc serial# 1541841 with one (1) 2 wilkins 950xl3 dc on meter# 0023151896
Valuation:
N/A
Permit #:
PW20250319866
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; replace one (1) 4” ames 4000ss rp serial# 4kk1646 with one (1) 4” wilkins 375astr rp backflow prevention assembly on meter# 0082378474 on the industrial water service located in the fire pump room
Valuation:
N/A
Permit #:
PW20240611454
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; inspection for assemblies replaced by others - a 6 350astda serial# 40139 & one (1) 3/4 950xld serial# hc84121 on the fire main water line on level b1
Valuation:
N/A
Permit #:
PW20250916091
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; removal of one (1) 1 rplf4a serial# 747964 on the water service located in the 5th floor main kitchen
Valuation:
N/A
Permit #:
PW20250221231
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; replace one (1) 1” febco 825ya rp serial# h000506 with one (1) 1” lead free rp backflow prevention assembly on meter# 0031951487 on the irrigation water service located at 601 townsend street
Valuation:
N/A
Permit #:
PW20240805637
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; replace one (1) 75 wilkins 975xl2 rp serial# 4498831 with one (1) 75 lead free rp backflow prevention assembly on meter# 0070360633 on the irrigation water service located at 455 fell street
Valuation:
N/A
Permit #:
PW20240129207
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; replace one (1) 1/2 40-203-02 serial# g9578 in the boiler room at the side of the building
Valuation:
N/A
Permit #:
PW20250303478
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; obtain one (1) plumbing permit from t1072.0he san francisco’s building department for the replacement of one (1) 6” wilkins 375a rp serial# 102911 with one (1) 6” wilkins 375ast rp backflow assembly on the cooling tower water service located on the rooftop
Valuation:
N/A
Permit #:
PW20231027201
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 11p; replace one (1) 3/4 watts lf007m3qt dc serial# 001788 with one (1) 3/4 watts dc backflow prevention assembly on the fire bypass water service located in the basement compressor room
Valuation:
N/A
Permit #:
PW20230328787
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
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Backflow Prevention Specialists Inc License info
Verified License
| License # | 427328 |
| Status | Active |
| State | California |
| Type | Plumbing, General Building, Warm Air Heating, Ventilating And Air Conditioning, Fire Protection, Sheet Metal |
| Business Type | Corporation |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Backflow Prevention Specialists Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 452472 |
| Status | Active |
| City | Milpitas |
| Type | General Contractor |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of September, 2016. Check the current license status of Backflow Prevention Specialists Inc with the The City of Milpitas, CA
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CK-1267 |
| Status | Active |
| City | Milpitas |
| Type | Contractor, General |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of September, 2016. Check the current license status of Backflow Prevention Specialists Inc with the The City of Milpitas, CA
This is a sample of licensing data; click here to access a complete history.
113
BuildZoom Score
Bonded
| Bonded Agent | Developers Surety & Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Republic Indemnity Company Of America |
744
Permits
- Building permit records show that Backflow Prevention Specialists Inc has worked on 744 permitted projects.
Backflow Prevention Specialists Inc Employees
BS
Backflow Prevention Specialist
Owner
BB
Benjamin Charles Bennett
Officer
CF
Carol Joseph Flynn
Rmo
CB
Charles Varley Bennett
Rmo/Ceo/Pres
CB
Cristeena Gomez Bennett
Officer
TS
Tara Jean Santens
Officer