Frequently Asked Questions

Q: What is a backflow prevention device?

A: A backflow prevention assembly protects water supplies from contamination. It allows the water to flow in one direction only. Backflow prevention devices must be tested to ensure that they are functioning properly.

Q: Why do I need my backflow device tested?

A: Backflow prevention protects the public potable water system from contamination. There are thousands of reported cases of backflow contamination each year. Some cases can be fatal. Since backflow devices contain parts that can break down and wear out it is important to test them to make sure your devices are functioning properly.

Q: How often do I need to test my backflow device(s)?

A: California law requires that buildings with backflow devices must have them tested once a year. Backflow device testing protects the water supply, ensuring that it remains pure, clean and safe from any possible source of contamination.

Q: How do I get my backflow device tested, and how much will it cost?

A: Go to the "Contact Us" link at the top of the website. Complete the form. A representative from Ahlee Backflow Service Inc. will contact you to confirm receipt of your information, to schedule your testing and to notify you of the cost of your service.

Q: How will the water authorities know that my backflow device has been tested?

A: Upon completion of your testing, we will send the appropriate paperwork to the local water authorities. You will also receive a copy of the test results in the mail along with your invoice.

Q: How long does the test take?

A: The test takes about 10-15 minutes per backflow device. The water will be turned off for a brief time (approx 1-3 mins) during the test.

Q: When do I know that my backflow devices are due to be tested?

A: Your local water authority will notify you when it is due for your testing. It is normally the same time every year but it is best to wait until you receive your notice from them.