Make sure that the breast pump has been cleaned. Also, assembling the breast pump while it is still a bit moist from sterilising can help to improve the vacuum.

If not correctly assembled or if any of the parts are damaged, the breast pump can leak air, which reduces the suction power.

1. Insert the white valve into the pump body, so that it fits securely into the small round hole. Make sure that the pointed side of the valve is facing down and it is not damaged.
2. Fit the clear silicone diaphragm into the pump body. Ensure a perfect seal around the rim by pressing down with your fingers. (You may find it easier to assemble if the diaphragm is wet).
3. Make sure that the detachable cushion is securely attached to the pump body. Make sure that the inner part of the cushion is pressed all the way up to the line (indicated with an arrow). Secure the rim around the funnel making sure that there are no gaps. (You may find it easier to assemble if the Cushion is wet).

The breast pump may also show low suction before expressing. Make sure that the pump is positioned correctly on the breast to allow a seal between breast pump and breast.

Do not mix parts of other breast pumps not belonging to the Philips Avent breast pump range.

Should you still experience low/no suction, we recommend buying new spare parts on www.philips.com/support.