eufy Security replacement duckbill valves & silicone flange inserts for E10/E20/S1/S1 Pro - 4‑pack, food‑grade silicone for restor

Replacement duckbill valves and silicone flange inserts designed for eufy E10, E20, S1 and S1 Pro breast pumps for reliable suction and comfortable sessions.

This 4-pack of eufy duckbill valves and silicone flange inserts gives you a set of safe, food-grade parts to restore or customize your pump’s performance. Each piece is engineered to mate precisely with eufy E10, E20, S1 and S1 Pro models, making it simple to swap worn components and maintain steady suction. The soft silicone helps preserve comfort while pumping, and a recommended replacement cadence keeps your pump operating at its best.

How do these valves improve my pump’s performance?

Worn or stretched valves reduce suction and can make pumping less efficient. Replacing valves with fresh duckbill silicone restores the one-way airflow seal that breast pumps require, improving suction consistency and milk expression.

• Restores original suction by resealing the air pathway.
• One-way duckbill design prevents backflow to the pump.
• Soft silicone conforms to flange shape for better contact.
• Sold as a 4-pack to replace multiple valves or keep spares.

Are these compatible with my eufy model?

Yes — these duckbill valves and flange inserts are explicitly compatible with the eufy Breast Pump E10, E20, S1 and S1 Pro. They are shaped and sized to fit the factory components so installation is straightforward.

• Designed for E10, E20, S1 and S1 Pro models only.
• Direct-fit parts avoid adapters or modification.
• Clear sizing guide helps you choose correct flange inserts.

How often should I replace the silicone flange inserts and valves?

Replacement frequency depends on individual use, but typical lifespan guidance helps keep performance consistent. eufy recommends replacing flange inserts every one to two months and the duckbill valves roughly every three months or sooner if you notice reduced suction.

• Flange inserts: replace every 1–2 months as comfort needs change.
• Duckbill valves: typically last around three months under regular use.
• Change parts sooner if suction weakens or silicone shows wear.

What materials and warranty cover these parts?

The valves and inserts are molded from food-grade, soft silicone to be gentle on skin and safe for pump use. eufy backs these accessories with a 90-day limited manufacturer’s warranty to cover defects in materials and workmanship.

• Made from food-grade soft silicone for safety and flexibility.
• Covered by a 90-day limited manufacturer warranty.
• Follow cleaning and replacement guidelines to maintain hygiene.

Who is this for: Parents who own eufy E10, E20, S1 or S1 Pro pumps and want to maintain peak performance or customize fit and comfort. This 4-pack suits frequent pumpers, caretakers managing multiple pumping sessions, or anyone who prefers to keep fresh valve spares on hand for reliability and hygiene. Use the included sizing guidance to pick the correct flange inserts for changing nipple size during different breastfeeding stages and replace parts promptly when you notice decreased suction.