Magnetic Drain ValveAction Magnet Specs Spiral Lock Open Push and rotate to open the valve and facilitate quick purges of sediment. When fully rotated, the valve locks in the open position, which is useful for draining the entire reservoir. Rotate the opposite direction to close. Heavy duty spring offers resistance and protects the valve from accidentally opening. The drain port has been fitted with a rare earth magnet to capture ferrous wear particles. The magnet is