Containment and Isolation

A containment program is designed to protect the public water supply. An internal, or isolation, program protects the occupants of a building from contamination or pollution from internal processes. JEA is responsible for tracking the installation and annual testing of containment backflow preventers.

  • Containment - JEA requires containment devices to be installed on all dedicated irrigation or fire sprinkler lines and on most potable (drinking) water supply pipes. Containment backflow preventers are located near the customer’s connection to the JEA water supply, typically within 10 feet of the JEA water meter. All containment devices must be certified as functional, with the test results submitted to JEA annually. 
  • Isolation - Isolation backflow preventers are internal devices that are not located near the JEA water supply pipe. They isolate potential hazards in one area from other areas of the customer’s water system. JEA policy does not require installation, maintenance or annual testing of isolation (internal) backflow preventers. Installation and testing of these devices may be required by other entities, however, such as the local plumbing code, health department regulations or fire codes. Under most circumstances, commercial customers do not need to submit annual certification reports for isolation devices to JEA.

Premises with Both Types

JEA requires only the containment backflow preventer (near the water meter) to be certified annually. Test reports for isolation devices do not need to be submitted to JEA.