The Whirlpool WPW10190514 Washer Vacuum Break Assembly has become an insignificant but essential part of your washing machine. It serves as a one-way valve that prevents dirty drain water from recirculating to your washer during the drain cycle. It works as, Throughout the drain cycle, the vacuum that's formed draws water into the washer tub. The vacuum brake system releases to enable air into the sewer pipe, breaking the syphon and preventing unclean water from returning. After the draining is finished, the valve shuts again. This seemingly fundamental component has multiple benefits. Initially it prevents your clean clothes from getting tainted with contaminated drain water. Furthermore, it enhances optimum drainage efficiency by guaranteeing a full drain cycle.