Backflow Testers & Cross-Connection Specialists
Redwood City’s Cross-Connection Control Program maintains a list of qualified backflow prevention assembly testers approved to perform required performance testing on all backflow prevention assemblies located within Redwood City’s service area. The City will only accept backflow test results from testers on the City’s Qualified Tester List. Testers must receive confirmation from the Cross-Connection Control Program of their status on the Approved List prior to testing an assembly. Redwood City also maintains a list of qualified cross-connection specialists approved to conduct cross-connection tests and surveys within the City's service area.
Quick Links
Backflow Prevention Assembly Test Entry Portal
Qualified Specialist List (coming soon, apply today)
Qualified Backflow Prevention Assembly Tester Terms & Conditions
How to Submit Backflow Performance Tests
Test reports are due to the City within 30 days from the City's first notice to customer. If an extension is required, the customer is responsible for contacting the City in writing.
Electronic Test Reports:
Required for all routine tests, repairs, and replacements of existing assemblies.
Qualified testers and designated signatories must register and submit test reports online through the City's Backflow Prevention Assembly Test Entry Portal.
Written Test Reports:
Required for all newly installed assemblies and assemblies used for temporary construction meters.
Backflow assembly tests must be reported on the City's Backflow Assembly Device Field Testing and Maintenance Report within 15 days of completion, and must be submitted on the official City form or they will be rejected.
Backflow Prevention Assembly Field Testing and Maintenance Report
Printed copies of the official test forms are available at:
Public Works Services
1400 Broadway Street
Redwood City, CA 94063
Written Test Reports shall be submitted to the Cross-Connection Control Program by mail or in person at the address for Public Works Service above or by email to crossconnection@redwoodcity.org
Backflows Tags
Backflows Tags issued by Redwood City must be affixed to backflow assemblies upon a passing performance test. Backflow tags are available for purchase from the City in multiples of three for the amount listed in the City's Master Fee Schedule. Payments for backflow tags are taken at City Hall by the City' Revenue Services Division (1017 Middlefield Road, Redwood City, CA 94064) and picked up at Public Works Services.
Qualified Testers
To be included on Redwood City's list of Qualified Testers, testers must have on file with the Cross-Connection Control Program proof of the following items. Expired documentation will not be accepted, and it is the tester’s responsibility to provide updated documentation prior to expiration in order to be maintained on the list.
Qualified Testers must register for the City's Backflow Prevention Assembly Test Entry Portal, upload the following documents, and receive approval prior to performing any tests in Redwood City. By registering for an account testers and designated signatories agree to Redwood City's Qualified Backflow Prevention Assembly Tester Terms & Conditions.
- Redwood City Business License
- Proof of Insurance Coverage
- CA-NV AWWA Backflow Tester Certification
- Differential Pressure Gauge Test Kit Calibration Certification (required annually)
(Testers who do not want to be included on the published Qualified Tester List may request to be removed by contacting the Cross-Connection Control Program.)
Designated Signatories
Qualified Testers may designate one or more signatories to enter test reports on their behalf into the Backflow Prevention Assembly Test Entry Portal. Qualified Testers must complete the Backflow Prevention Assembly Tester Signatory Authorization form and signatories must upload the form to the test entry portal for approval by the City.
Backflow Prevention Assembly Tester Signatory Authorization Form
Qualified Backflow Prevention Assembly Tester Terms & Conditions
Qualified Cross-Connection Specialists
To be included on Redwood City's list of Qualified Cross-Connection Specialists, specialists must have on file with the Cross-Connection Control Program proof of the following items. Expired documentation will not be accepted, and it is the Specialist’s responsibility to provide updated documentation prior to expiration in order to be maintained on the List.
- Redwood City Business License
- Proof of Insurance Coverage
- CA-NV AWWA Cross-Connection Control Program Specialist Certification
- Signed Application and Agreement for each Specialist
Qualified Cross-Connection Specialist Application and Agreement
Notices to Testers and Specialists
Contact Us
Mail / In Person |
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Public Works Services |
Apply for a Redwood City Business License
You can apply for a Redwood City Business License by submitting an application online, by mail or in person at City Hall. Visit the City's Business Licensing web page here.