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Digital pH/Dual ORP/FAC PPM Controller With One 77 GPD and One 38 GPD Peristaltic Pump composition_Chlorinated Rubber This Emergency Spa Alarm aluminumThe Rola Chem 555017 Digital pH Dual ORP FAC Controller Package is designed for two sanitizer sources and includes one 77 GPD and one 38 GPD Pro Series Peristaltic Pump. The RC555XXP digital controller is an innovative system designed to automate and monitor the dosing of liquid chemicals for any water feature. It is equipped to monitor two sanitizer sources, including your salt generator. The RC555XXP controller has remote monitoring built in, so