The RFK-375W1 Retrofit Kit can be added to an existing 2-1/2” to 10” Zurn Wilkins Reduced Pressure Principle (RP) backflow preventer. The Retrofit Kit converts and existing Zurn Wilkins Backflow Preventer into a W1 Connected Backflow Preventer where water pressure and relief valve discharge volume data will be transmitted to plumbSMART™, the secure web portal powered by Zurn. The retrofit kit can also be used to directly connect into an alarm or BMS system.