Patterson backflow prevention requirements
Start with the utility page to confirm who is affected, accepted submission methods, phone contact, and source evidence.
City backflow route
Patterson backflow testing routes through City of Patterson Backflow Prevention Device Annual Test Program.
City search demand maps directly to Patterson's annual-test and approved-tester workflow. This page keeps the city search term visible while routing the actual compliance work to the governing utility record.
City: Patterson
Utility: City of Patterson Backflow Prevention Device Annual Test Program
Cadence: Annual
Last verified: 2026-06-29
Next action
Pick the Patterson backflow path that matches the problem
The city term helps discovery. The governing utility still decides the rule, submission method, tester route, and follow-up order.
Patterson annual backflow testing
Annual Patterson mails periodic test and maintenance letters in January and expects property owners to notify the city of their selected approved outside tester. If the owner does not respond, the city may perform the testing itself.
Patterson approved backflow testers
This utility has an official tester-list route. Confirm status on the governing list before treating a provider as approved.
Patterson failed backflow test
Use the failed-test page when the assembly has already failed and the next step is repair, retest, and report submission.
Why Patterson maps to City of Patterson Backflow Prevention Device Annual Test Program
City search demand maps directly to Patterson's annual-test and approved-tester workflow.
- Property owners and responsible parties whose backflow prevention devices are installed on the City of Patterson water infrastructure.
- Patterson does not frame the workflow as optional. If an owner does not notify the city of an approved outside tester after the annual letter, the city can move forward with testing under the program.
- Program phone: 209-895-8063
- City route reviewed: 2026-04-05
Source-backed workflow
Patterson is valuable because the official page publishes the January annual-mailing cycle, the city-notification workflow, and a live table of approved outside testers.
Provider layer
Public provider profiles mapped to this utility
Provider profiles can help after the city and utility workflow is clear. They do not replace the official source trail.
Premier Backflow & Plumbing
Officially listed on Patterson's approved outside tester table.
Same Day Backflow
Officially listed on Patterson's approved outside tester table.
Support guides
Read these before acting on the Patterson workflow
How we verify local backflow rules
What counts as an official source, how local utility pages override generic assumptions, and how stale pages are re-verified.
Anniversary date vs calendar deadline
Why some utilities track backflow tests by anniversary date, while others push owners into a calendar-season or hard-date deadline.
Residential vs commercial backflow rules
Why the local trigger is rarely just residential versus commercial, and how utilities actually split hazard, irrigation, multifamily, and managed-property cases.
Backflow test cost
How to think about annual testing, repair, and retest pricing without confusing a market quote with the compliance rule.