If there is a cross connection than water will flow in the reverse direction. This is a result of back pressure or back siphonage. San Diego Backflow Testing has 20 years of experience which ensures the job is done right the first time.
There are many parts to installing a backflow device. Call San Diego Backflow Testing for an immediate install. We do it right the first time. We will handle the installation and all paperwork to the water district. Let us do the work for you.