Maymom 21mm Flange & Duckbill Valve for Spectra S1/S2 9 Plus – Replacement Pump Parts

Elevate your Spectra pump experience with Maymom replacement parts

Designed as a reliable option for Spectra S1, S2 and S1Plus pumps, the Maymom 21mm flange and duckbill valve set offers a practical alternative to OEM components. While not original Spectra parts, these Maymom replacements are built to fit the same breasting routines, delivering a familiar feel and consistent performance patterns for daily use.

Whether you are seeking a spare set for busy days, or a fresh pairing after cleaning, these parts are intended to support a smooth, uninterrupted pumping routine. The 21mm flange size is one of a broad range Maymom provides, helping you discover a comfortable fit that aligns with your bottle and pump setup.

What’s included and how it fits your setup

• Contents: two 21mm flanges and two duckbill valves compatible with Spectra S2, S1 and S1Plus pumps.
• Interchangeability: designed to work with Spectra pump parts, offering a replacement option that mirrors the intended suction power of compatible parts.

Flange sizing and bottle compatibility

• Flange range: 13mm, 15mm, 17mm, 19mm, 21mm, 24mm, 25mm, 27mm, 28mm, 29mm, 30mm, 32mm — a broad selection to help you find a comfortable fit.
• Maymom flange can work with Spectra wide-neck bottles, Avant bottles, and Maymom widemouth bottles, providing flexible bottle-adapter options.

Duckbill valve design and practical use

• Duckbill valves feature easier plug-in and removal with a durable build, plus available color options for easy identification.

Safety, materials, and care

• Materials are BPA and DEHP free and FDA compliant for food contact scenarios.
• Independent lab testing reports are available online for reference.
• Retail packaging is sealed by the manufacturer and designed for reliable delivery.
• Cleaning guidelines include dishwasher top rack, steam cleaning, boiling water, or microwave-steam bags with no reported issues.

Notes: Maymom is a separate brand and is not affiliated with the Spectra trademark owner. These parts are intended as replacement options, not original Spectra components. Individual results may vary depending on your pump model and setup.