1. Attach the duckbill valve to the small hole inside the container. Flick it to ensure it does not fall out.

2. Install the container back: Align the lid with the top slot and fit the bottom tab into the container slot. Press firmly the upper part with both hands first, then the lower part until you hear a click. (You can see the alignment marks above the container back if securely assembled.)

3. Fit the diaphragm into the contoured position at the container back, ensure the diaphragm rim is fully sealed along the groove edge, and press the diaphragm lid firmly to ensure a secure seal. (Ensure the diaphragm is completely dry before assembly. Moisture may cause damage to the pump hub.)

4. Align the peg on the pump hub with the hole in the diaphragm, and press the assembled container onto the hub until it clicks.

5. Press the flange onto the pump.

6. Use the Nipple Measurement Card to select an appropriate sizing insert, and place it in the flange tunnel.

If you have any other questions, please don't hesitate to contact eufy Support Engineers for further assistance.