The Backflow Testing Process

It’s the law that business owners have a backflow test performed annually at their premises, so a certified plumbing company needs to perform the test. The backflow testing process typically takes about 20–30 minutes to complete, if there are no repairs needed. Valves are opened and closed to check for any irregularities, and a form is then submitted to the local city, ensuring it meets the correct standard and that there are no code violations.

Why the Test Is Important

Drinking water flows through pressurized water taps from the source to your tap, generally in one direction — but on some occasions it may flow in the opposite direction, or “backflow.” This water is not drinkable and may contaminate the drinking water supply. Backflow can be caused by a water main break or high demand at a water hydrant, and testing is necessary because you can never be sure when backflow is going to happen.

How to Book a Test

Numerous state regulations require a backflow test to be performed annually. A letter from the city will be sent with a backflow test report form a month before it is due. Once you receive this letter, contact a licensed plumber at Water Doctor of Washington. After being tested and certified, the report must be filed back to the city that sent it.

Before the Test Is Done

• Permission needs to be obtained from the owner or representative of the property for the water to be shut off. If the device supplies a fire line, the appropriate authorities need to be notified.
• Observe and record the conditions of the device assembly and the surrounding area.
• Record or verify the manufacturer, model, serial number, size, and location of the device.

Once the formalities are done, the actual test begins. There are two main purposes: to see if backflow is present and to determine the issue causing it so it can be fixed. The plumber closes valves and checks for changes in gauge movement, water leaks, and other clear signs. There is nothing specific a property owner needs to do to prepare, other than making alternative plans for water use during the shut-off. Contact Water Doctor of Washington for a licensed plumber to test or install a backflow preventer device.