Maymom 18mm Breast Pump Flange & Duckbill Valve Set — Spectra S1 S2 9 Plus Compatible, BPA-Free (2 Flanges + 2 Valves)

Maymom 18mm flange and duckbill valves are replacement breast pump parts engineered to fit Spectra S1, S2 and Spectra 9 Plus pumps and restore proper seal and suction.

If you need a direct, reliable replacement for worn or missing Spectra-compatible parts, this two-flange and two-valve set from Maymom provides a ready swap. These pieces are made by Maymom (not the original Spectra manufacturer) and are sized to work seamlessly with Spectra wide-neck bottles and several common bottle adapters. They arrive sealed in manufacturer packaging and are produced from BPA/DEHP-free materials with independent testing for food-contact safety.

Will these parts actually fit my Spectra S1, S2 or Spectra 9 Plus pump?

Yes — the 18mm flange and duckbill valves are built to be interchangeable with the original Spectra components. They connect to the pump’s flange interface and the duckbill valve seating in the same way as OEM parts, restoring normal pumping action.

• Designed for Spectra S1, S2 and Spectra 9 Plus compatibility
• Works with Spectra wide-neck (wide-mouth) bottles and many third-party adapters
• Fits existing tubing and connector assemblies used with Spectra pumps

How do these Maymom valves and flanges affect suction and performance?

Maymom parts are manufactured to match the form and function of the originals so you should experience comparable suction and rhythmic pumping. Proper installation and undamaged tubing are required to achieve the same performance as OEM parts.

• Duckbill valves designed for consistent one-way airflow
• Flange geometry preserves seal for efficient vacuum transfer
• Pack of two flanges and two valves helps ensure quick replacement when needed

Are these parts safe and easy to clean?

The components are made from materials that are free from BPA and DEHP and are tested for food-contact safety. Cleaning guidance follows typical breast pump accessory care: top-rack dishwasher, boiling, or steam bag methods are acceptable per the manufacturer’s test results.

• Certified BPA/DEHP-free and lab-tested for safety
• Manufacturer-sealed retail packaging for hygiene
• Compatible with dishwasher top rack, boiling water, and microwave steam cleaning

How do I know which flange size I need and what else is available?

This listing is for the 18mm flange; Maymom also produces a wide array of other flange sizes to match personal fit. Choosing the correct flange size helps comfort and milk flow — many parents measure nipple diameter and add the typical fit allowance to pick the right cup.

• Available flange sizes include 13mm up through 32mm from Maymom
• 18mm is included in this kit; other sizes sold separately
• Compatible with Avent and Maymom wide-mouth bottles when using proper adapters

Who is this for: This replacement set is aimed at parents who already use a Spectra S1, S2 or Spectra 9 Plus pump and need spare or replacement parts without waiting for OEM stock. It’s also suitable for anyone seeking a cost-effective, safety-tested alternative part that maintains pump performance and works with wide-neck bottles and common adapters. If you want sealed, dishwasher-safe flanges and duckbill valves that are straightforward to swap in and restore normal suction, this Maymom kit is a practical option.