Quick answer
Replace your DiscreetDuo milk valves when you notice reduced suction, lower milk output, or visible damage—typically every 2–3 months with regular use. Keep a spare set on hand so you can swap them out the moment performance dips.
Why valve wear matters
The milk valves in your wearable pump are small silicone parts that create the one-way seal needed to build suction. When they lose their shape or flexibility, air leaks in and suction drops. That means less milk per session and more time spent pumping.
Valves are consumable parts, not meant to last forever. Daily use, repeated washing, and exposure to heat all contribute to wear. Even with careful care, they will eventually need replacing to keep your pump working as designed.
How often to check and replace
A good habit is to inspect your valves every 2–3 weeks. If you pump daily, plan to replace them every 2–3 months. But this is only a guideline—your own observations matter more than a calendar. If you notice any of the signs below, replace them sooner.
Keep a spare pack of genuine valves in your pumping bag. That way, you are never caught without a clean set when it is time to swap.
Diagnose and fix your valve issue
- Symptom: Reduced suction, lower milk output than usual, or milk backing up into the pump body. You may also see visible creases, tears, or a valve that no longer lies flat.
- Likely cause: The silicone valve has lost its shape or flexibility from regular use, repeated washing, or heat exposure. A stretched or deformed valve cannot create a proper seal. Inspect valves every 2–3 weeks, especially if you pump daily.
- Corrective action: Remove the old valve and press a new, clean one firmly into place. Test the pump briefly to confirm suction feels normal again. If you do not have a spare, order a replacement pack before your next pumping session. Keep a spare 2-count pack on hand so you can swap valves immediately.
- When to stop or choose another option: If you replace the valves and still notice weak suction, the issue may be elsewhere—check the pump seal, tubing, or flange fit. If problems persist, consult the pump manual or contact Lansinoh support. Do not continue using a pump that is not working properly.
Product facts
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DiscreetDuo Wearable Pump - Milk Valves 2ct: This 2-count pack of genuine Lansinoh milk valves is designed for the DiscreetDuo Wearable Pump and is simple to install. Having a spare set ready means you can replace worn valves immediately, maintaining consistent pump performance without downtime.
DiscreetDuo Wearable Pump - Milk Valves 2ct
