FL Irrigation Backflow Guide
Backflow type finder, county rules, annual test scheduling & FDEP cross-connection. FDEP / FPC 2023 / FAC 62-555.
Find Your Required Backflow Preventer
A 4-question tool identifies the correct backflow preventer type required by Florida law and your county's cross-connection control program, based on irrigation system type, water pressure zone, sprinkler-head submersion risk, and whether the work is a new installation or replacement.
FL Backflow Device Types — Quick Reference
- AVB — Atmospheric Vacuum Breaker (LOW hazard only, simple residential): Cheapest and simplest. Permitted only where the downstream system cannot be pressurized for more than 12 consecutive hours. Cannot be installed downstream of any shutoff valve. NOT acceptable for reclaimed water in FL.
- PVB — Pressure Vacuum Breaker (moderate hazard, standard FL residential): Most common for FL residential irrigation on potable water. Must be installed at least 12" above the highest downstream outlet. Requires annual testing. Acceptable where shutoff valves are downstream. Not allowed for reclaimed water.
- DC — Double Check Valve Assembly (low-moderate hazard, commercial irrigation): Two independently operating check valves with test cocks and shutoffs. Good for below-grade installation. Acceptable for low-to-moderate hazard commercial irrigation. Not acceptable for reclaimed water or high hazard. Requires annual testing.
- RP — Reduced Pressure Zone Backflow Preventer (high hazard / reclaimed water required): Highest protection level. Required for all reclaimed water irrigation in FL (FAC 62-610). Also required for commercial potable irrigation in many FL counties and for any high-hazard connection. Must be installed above grade. Requires annual testing.
County-by-County Irrigation Backflow Requirements
A county selector provides cross-connection control program requirements for Miami-Dade, Broward, Palm Beach, Hillsborough/Tampa, Pinellas, Orange/Orlando, Lee/Fort Myers, Collier/Naples, Duval/Jacksonville, Sarasota, Volusia/Daytona, and Brevard/Space Coast.
FL Reclaimed Water — Statewide Rules (FAC 62-610)
| Requirement | Rule |
|---|---|
| Backflow device required | RP (Reduced Pressure) — statewide minimum per FAC 62-610.470 |
| Cross-connection to potable | Strictly prohibited — $10,000/day fine; must have physical separation |
| Meter color | Purple pipe, purple meter, purple valve tags — all reclaimed components must be purple-coded |
| Setback from wells | 75 ft from any potable well; 200 ft from Class I wells |
| Annual test | Required — certified backflow tester only (FL licensed CFC or CBC with backflow cert) |
| Signage | "RECLAIMED WATER — DO NOT DRINK" signs required at point of use |
| FDEP permit | Reclaimed water use permits issued by FDEP for new connections to reclaimed mains |
| Responsible utility | Local utility (SFWMD, SWFWMD, or other WMD) enforces cross-connection control |
FDEP Cross-Connection Control — Key Rules
- FAC 62-555.360: All public water supply connections must have backflow protection as a condition of service. Utilities must maintain cross-connection control programs.
- FPC 608.16.5: Irrigation systems connected to potable water require backflow prevention at the connection point — either a PVB, DC, or RP depending on hazard level.
- FAC 62-610.470: All reclaimed water irrigation systems connected to potable water supply must have an RP-type backflow preventer.
- FDEP inspection authority: FDEP can inspect any potable water system at any time for cross-connection compliance. Non-compliant connections can result in service termination by the utility.
- Retrofit requirements: When a property connects to a new reclaimed water main, the existing backflow protection may need to be upgraded from PVB to RP — check with your local utility.
Annual Test Due Date Calculator
Florida cross-connection control programs typically require annual testing of PVB, DC, and RP backflow preventers. A calculator takes your last test date, device type, and county to show the next due date and test urgency.
Certified Backflow Tester Requirements in FL
| Requirement | Details |
|---|---|
| License type | FL-licensed CFC (Certified Florida Contractor) — Plumbing Division, or CBC (Certified Building Contractor) with backflow certification endorsement |
| Backflow cert | AWWA (American Water Works Assoc.) Level I or II backflow certification, or utility-approved equivalent |
| Test equipment | Must use calibrated differential pressure gauge kit; kit must be calibrated annually |
| Test report | Written report required after each test — submitted to property owner AND to local utility's cross-connection control program |
| Failure action | If device fails test — system must be shut off until device is repaired and re-tested; tester must document failure and corrective action |
| Repair restrictions | Only the licensed plumber or certified backflow specialist may perform device repairs — homeowners cannot self-repair and self-certify |
FL tip: Test reports must typically be submitted within 30 days of test completion to the local utility. Miami-Dade WASD, Broward County WD, and Palm Beach Water Utilities all have online portals where testers upload results directly. Keep copies of test reports for 3 years as proof of compliance.
Most Common Backflow Test Failures in FL
- PVB check valve fails to hold: FL's climate accelerates rubber seat degradation. PVBs in direct sun fail more often — cover with approved PVC housing. Replace seat and poppet annually if near saltwater.
- RP relief valve drips continuously: Means there's back-pressure higher than Zone 1 differential — often caused by an irrigation head with stuck-open zone valve or downstream check valve.
- PVB installed below top of highest sprinkler head: Most common installation error in FL — PVB must be 12" ABOVE the highest downstream outlet. Failed inspection instantly.
- AVB used where shutoff valve is downstream: Illegal in all scenarios where a zone valve or shutoff is downstream of the AVB. AVBs can only be used as the last device before the sprinkler.
- Device not accessible for testing: Backflow preventers must have 12" clearance above and 6" on each side. Devices buried in landscaping or enclosed in planters commonly fail inspection for access.
Free Backflow Inspection & Quote
FL-licensed CFC plumbers who are certified backflow testers handle the test, the report, and the utility submission — plus installation or replacement if your device needs upgrading.
Our Backflow Services Include
- FL-licensed CFC plumbers — AWWA-certified backflow testers
- Annual test, written report, and utility submission
- PVB, DC, and RP installation & replacement
- Reclaimed water RP upgrades — permit + inspection
- Commercial multi-device backflow programs
- FDEP cross-connection compliance documentation
- Test failure repair — parts and re-test same day where possible
- 12-month service reminders for next annual test