Feature 【Applicable model】 It is an alternative heavy-load contactor for K-Rain 1522 pump start relay and is applicable to irrigation pump, automatic sprinkler system pump, water plant pump, etc. 【1522 Pump Start Relay】 A pump start relay is an electrical device that allows your irrigation timer to communicate with the pump. This device is imperative when you are using a pump to supply water to your irrigation system. Pumps are built to use normal house currents; The relay changes the irrigation timer to normal household voltage. 【High Quality Material】 .