The HygieniKit valves are Ameda breast pump parts designed to preserve pump suction while allowing milk to flow into a milk storage bag, bottle, or other collection containers. Ameda valves are compatible with several of Ameda's hospital-strength personal pumps and multi-user breast pumps, which use the Ameda HygieniKit Milk Collection System. To ensure the best performance of your breast pump, we recommend replacing valves every 8-12 weeks, depending on cleaning and use. Replacement parts can be easily swapped into your current setup at any time and help keep you pumping as efficiently as possible.