Backflow Testing, Repair & Installation on O'ahu

Backflow preventers stop contaminated water from flowing backwards into the public water supply. Without them, irrigation water, chemicals, or non-potable water could enter the drinking water system during a pressure drop. Hawaii and Honolulu BWS require them on irrigation systems, commercial properties, and certain residential connections.

Annual testing is required by the Honolulu Board of Water Supply for most commercial and irrigation backflow devices. Some high-hazard applications require more frequent testing. We'll note your device type and schedule reminders so you never miss a compliance deadline.

A failed test means your device is no longer protecting the water supply as required. You'll need to repair or replace the device and pass a retest to stay compliant. We can repair most failed devices on the same visit or schedule a quick repair appointment and retest.

No — Hawaii requires testing to be performed by a certified backflow tester. The tester must submit results to the Honolulu Board of Water Supply. Our technicians hold the required certifications and handle the entire testing and reporting process.

A standard test on a single device takes 15–30 minutes. Commercial properties with multiple devices take longer depending on the number and location of devices. We schedule efficiently and minimize disruption to your property or business.