Backflow testing for City of Sunnyvale customers
Sunnyvale requires backflow devices to be maintained and tested every year, and publishes a list of approved backflow testing contractors. BackflowCare tests assemblies for City of Sunnyvale customers in Sunnyvale, and files the results with City of Sunnyvale.
- Area
- Santa Clara County
- Cities we serve
- Sunnyvale
- Annual test
- Owner hires a certified tester
- Deadline
- If the City’s inspection finds you need a backflow device, it notifies you within 30 days with a letter included in your utility bill.
- Our price
- $199 per device ($25 off for new customers)
City of Sunnyvale testing rules
- The City offers free inspections to help residents and businesses check whether they comply.
- Lawn irrigation and fire sprinkler systems need an approved backflow prevention device.
- Private wells must also have proper backflow protection.
- Water service may be disconnected if requirements aren’t met after repeated requests.
Source: City of Sunnyvale Water backflow program (official page), checked October 19, 2026.
City of Sunnyvale backflow questions
Who tests backflow devices for City of Sunnyvale customers?
Sunnyvale requires backflow devices to be maintained and tested every year, and publishes a list of approved backflow testing contractors.
Which cities does City of Sunnyvale serve?
We serve City of Sunnyvale customers in Sunnyvale.
When is the City of Sunnyvale backflow test due?
If the City’s inspection finds you need a backflow device, it notifies you within 30 days with a letter included in your utility bill.