Dairymaster Centrifugal milk pump auto drain spring The Dairymaster Centrifugal Milk Pump Auto Drain Spring is a genuine Dairymaster replacement part designed to ensure smooth, reliable operation of your pump’s automatic drain valve. This precision-engineered spring provides the correct pressure and return action for the valve mechanism, allowing it to open and close accurately during each wash or milking cycle. Built from high-strength, corrosion-resistant stainless steel , the spring is designed to perform in the demanding conditions of the dairy environment — withstanding exposure to heat, moisture, and cleaning chemicals without loss of tension or performance. It plays a crucial role in maintaining proper valve function, ensuring that residual milk and wash water are fully drained from the system to support hygiene and efficiency. When installed correctly, this spring helps your auto drain valve to: Open and close smoothly for accurate automatic drainage Maintain consistent pressure for reliable valve performance Prevent fluid retention and bacterial build-up in the pump Enhance system hygiene and milking efficiency Extend the lifespan of the drain valve assembly Key Features o