The S2 has 5 washable parts (all except the pump hub):
Duckbill Valve: controls milk flow into the container
Container Back: forms the rear wall and diaphragm seat
Diaphragm: creates the suction seal
Milk Container: holds the collected milk
Flange (+ sizing inserts): sits against the breast; tunnel guides the nipple
Pump Hub (NOT washable): the motor unit; always keep dry
If you have any other questions, please don't hesitate to contact eufy Support Engineers for further assistance.


















