Eufy Baby Breast Pump Valve 4s

The Eufy Baby Breast Pump Valve 4s is a four-pack of replacement duckbill valves for the eufy wearable breast pumps — compatible with the E10, E20, S1 and S1 Pro. These small silicone parts sit in the milk path and are one of the wear components that keep your pump working the way it should: as the valve flexes and seals, it helps the pump hold its vacuum so suction stays consistent through a session.

Like most soft valve parts, duckbills wear over time. If you've noticed suction feeling weaker, or milk sitting where it shouldn't, a fresh set is often what a pump needs rather than anything more involved. Having a four-pack on hand means you can keep both sides serviced and rotate in replacements without waiting on a delivery.

Closed, anti-backflow design

Each valve has a slit at the tip that stays closed when you're not pumping. It's designed to prevent breast milk from flowing back into the pump system and to help direct milk down into the collection container, so suction isn't lost during expression.

Food-grade silicone

The valves are made from durable, BPA-free, food-grade silicone that's soft, odourless and skin-friendly. The snug fit is designed to support comfortable, efficient pumping, and the smooth surface makes them straightforward to clean and sterilise between sessions.

How to use and care for them

Before first use, sterilise all washable components by boiling for 5 minutes with continuous stirring, or steaming for 5 minutes. When assembling, make sure the duckbill valve, flange tunnel, diaphragm and pump hub are all securely sealed. For everyday care, wash with warm, soapy water and rinse well after each use. To deep clean, use boiling water or steam at no more than 100°C (212°F) for 5–10 minutes. Avoid hard brushes — clean gently with your fingertips instead.

When to replace

These valves typically last 1–3 months, though it depends on how often you pump and clean them. Replace them if suction and performance start to drop with use and sterilisation, or based on your own usage. They're covered by a 90-day limited manufacturer's warranty.

Best For

The Eufy Baby Breast Pump Valve 4s is a great option for parents who:

• Use an eufy E10, E20, S1 or S1 Pro breast pump and need genuine replacement valves
• Want a spare set on hand to keep both sides serviced and avoid downtime
• Have noticed suction dropping off and want to refresh a wear part before troubleshooting anything bigger

It may not be the right fit if you have a different pump brand or model, as these valves are made specifically for the eufy E10, E20, S1 and S1 Pro.

Pandylane Pro Tip: Duckbill valves are a soft wear part, so it's worth checking yours regularly for tears, warping or loss of elasticity. A tiny split you can barely see is often the reason suction feels weaker — swapping in a fresh valve is usually quicker and cheaper than assuming the motor is at fault.