How Often Should You Replace Breast Pump Parts (and Why It Matters!)
By Dr. Kara Rangel, DC, IBCLC
The Well Chiropractic & Lactation Support
As moms, we rely on our breast pumps to help us provide milk for our babies. But here’s something many parents don’t realize: your pump is only as good as its parts!
Worn-out or old pump parts can affect suction, comfort, and even milk supply.
Let’s break down when to replace breast pump parts and why it’s so important!
Why Replacing Pump Parts Matters
Suction & Efficiency: Valves, membranes, and tubing wear down over time, reducing suction and milk output.
Hygiene: Parts that come into contact with milk can build up residue or grow bacteria if not replaced regularly.
Comfort: Flanges with cracks or warped edges can cause pain and nipple damage.
Protecting Supply: Inconsistent suction can send the wrong signals to your body about how much milk to make.
General Guidelines for Replacing Pump Parts
(Note: this may vary slightly depending on your pump brand—always check your manufacturer’s recommendations.)
Duckbill Valves or Membranes: Replace every 2–4 weeks if pumping daily. These wear out the fastest!
Backflow Protectors: Replace every 3 months. Look for moisture or mold inside.
Tubing: Replace every 3–6 months, or sooner if milk or condensation gets trapped inside.
Flanges/Breast Shields: Replace every 6 months, or earlier if you see cracks, warping, or cloudiness.
Bottles/Collection Kits: Replace every 6–12 months depending on use.
Signs It’s Time to Replace Sooner
Milk output suddenly drops without another explanation.
You notice loss of suction or hear “whistling” sounds.
Valves look stretched, thin, or no longer hold shape.
Flanges feel uncomfortable when they weren’t before.
Quick Tip
Keep a backup set of parts in your pump bag so you’re never caught off guard if something tears or wears out faster than expected.
Bottom Line
Your breast pump is a tool — and like any tool, it works best when maintained properly. Replacing your pump parts regularly not only protects your milk supply but also makes pumping more comfortable and efficient.
If you’re not sure whether your pump is working the way it should, or if you’d like help with flange sizing and pumping comfort, I’d love to support you.
Book a pumping consultation at The Well Chiropractic & Lactation Support to make sure pumping works with you, not against you!
