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<br />ReiduceidPressure Zone <br />Back~flow PreVeliter <br />RPZ <br /> <br />Reduced pressure <br />Z9neBackcflow <br />Pr~venter <br /> <br /> <br />Drain Hose threads <br />to have Vacuum <br />Breaker jilslaIIed. <br /> <br />A Reduced Pressure Zone type back-flow preventer must be installed on lawn sprinkler systems when <br />any sprinkler outlet is higher than the back-flow preventer or when the system is designed to add chemi- <br />cals or fertilizers. (May be subjectto constant static pressure, back pressure, and back syphonage.) Use <br />RPZ as last back-flow preventer ifAVB-PVB will not work. Must test RPZ upon installation, every year <br />and rebuild every 5 years. Contractors and homeowners installing RPZ back-flow preventers in the City <br />of Ramsey are required to inform the Building Official and provide details of their testing and inspection <br />program <br /> <br />Lawn Sprinkler <br />Page 4 of 4 <br />