# Backflow guides

Backflow Testers has 8 guides on certified backflow prevention assembly testers and backflow testing companies, grouped by country.

## General

- [What a backflow test costs](https://backflowtesters.fyi/guides/backflow-test-cost.md): Use a dated US price range and a scope checklist to compare written quotes.
- [Backflow testing frequency by state](https://backflowtesters.fyi/guides/backflow-testing-frequency-by-state.md): Selected official rules for Washington, California and Texas, plus a Canadian utility example.
- [How to become a certified backflow tester](https://backflowtesters.fyi/guides/become-certified-backflow-tester.md): Check local acceptance before you choose an ASSE, ABPA or state certification route.
- [How to choose a backflow tester](https://backflowtesters.fyi/guides/choose-backflow-tester.md): Confirm the named tester, utility acceptance, written scope and report handling.
- [Irrigation and fire line backflow rules](https://backflowtesters.fyi/guides/irrigation-fire-line-backflow-rules.md): Check system use, hazards and local acceptance before booking testing or repairs.
- [How to read a backflow test report](https://backflowtesters.fyi/guides/read-backflow-test-report.md): Check identity, initial results, repair notes and the final report before closing a notice.
- [RP, DC, PVB and SVB assemblies](https://backflowtesters.fyi/guides/rp-dc-pvb-svb-assemblies.md): Recognise the main assembly types without choosing or changing protection yourself.
- [What a backflow test checks](https://backflowtesters.fyi/guides/what-is-a-backflow-test.md): Understand the assembly test, the report and the utility notice before you book.