Nook note · Pump care · 4 min read
When to Replace Breast Pump Parts (Valves, Membranes & Tubing)
When a pump feels weaker, most mothers suspect the motor. Nine times out of ten it is a soft valve or a stretched membrane. Here is our replacement calendar for the nook.
Duckbill valves: every 1–3 months
Valves are thin silicone that opens and closes with every cycle. When the lips stop closing tightly, suction drops. If you pump several times a day, change them monthly; hold one up to the light and look for gaps or tears.
Backflow protectors and membranes: every 2–3 months
These keep milk away from the tubing and motor. A membrane that looks stretched, wavy or torn should go straight away.
Tubing: when it clouds or gets wet
Tubing does not touch milk in a closed system, but if condensation or milk gets inside and will not dry, replace it.
Flange inserts: every 1–2 months
Silicone inserts soften with washing and use. A fresh pair keeps the tunnel round and the seal tight.
Keep a spare set
A second set of parts in the work bag means nothing has to be washed in an office sink between sessions — and a torn valve never ends a day of pumping early.
This note shares practical experience and is not medical advice. If pumping keeps hurting, please see a doctor, midwife or IBCLC.
