Replacement 2 Piece Silicone Membrane/Diaphragm Compatible with Momcozy V1 / V2 Wearable Breast Pump, Momcozy V2 Pump Seal, Accessories Made by Durceler, Not Original Momcozy V1 Pump Parts, White

These replacement duckbill valves and silicone parts were exactly what I needed! They fit perfectly with my Momcozy pump and worked just as well as the original parts. The suction was strong and consistent, and I noticed no difference in performance. I love that they’re easy to clean and feel durable — definitely a great value for the price. It’s such a relief to have reliable spare parts on hand, especially during those long pumping days. Will definitely be reordering when I need more!

Fit my V1s perfectly

Super disappointed with the diaphragm, one hardly works which causes bad milk output on whatever side that diaphragm is on :(

It works as intended, fits both V1 and V2 pro without issues

I somehow misplaced the diaphragms for my V1 between baby #1 and baby #2 so needed to order replacement parts. They were cheaper on here than they were on the actual MomCozy website.

These work amazing with the Momcozy v2. I thought my pump was broken and purchased an entire new pump before ever changing the backflow protector. That was my issue. I also need to track down new tubing but I hate the V2 pro cups and this saved me and let me use my orginal V2. Very happy.

These were a perfect fit!

These were the only replacement parts I found and they did not disappoint I used these with the original momcozy valves replacements also and it took me 20 minutes to empty and it usually takes me 30! I have no idea why some moms have a bad experience. Keep in mind that you also have to make sure to take the time to place them onto the cup correctly