Select Mechanical Services specializes in RPZ testing. A Reduced Pressure Zone device is installed with your plumbing system to defend your drinking water from contaminants. Annual testing not only provides peace of mind but is actually required by state law. While the plumbing code found under section 603.4.2 might include some rather complex language, it specifies that homeowners with testable backflow devices need to have them tested by licensed professionals every year. Select Mechanical Services is happy to take care of that for you.