FEATURES: 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. Superior Material--The Pump Start Relay enclosure is constructed with a corrosion resistant, UV resistant, shockproof material. The rain-tight, secure, rustproof enclosure provides a safe and secure connection in a housing built to last. This model is 3HP@110/220V 24V COIL.This is your best bet. Function--Irrigation pumps, sprinkler pumps, etc. can be controlled through this relay，3 HP at 110-volt/220-volt 24-volt Coil. .