Water backflow preventer annual test. Test and certified backflow’s file reports with city per state code. 1-6” RPZ fire system failed needs rebuild complete 1-3” RPZ main build feed passed 1-1 1/2” RPZ feed to pool having Dave check with city customer has air gap to pool pit my not need this one replaced or if city says yes they need new device. 1- 3/4” RPZ fire meter line passed Customer to change batteries in flush valve before we replace the top of sensor flush valve battery operated.