Maymom 21mm Flange for Spectra S1/S2 Pumps — Duckbill Valve Backflow Kit

Overview

Maymom’s compatible pump-part set is designed to work with Spectra S1/S2 pumps and select Spectra models. The kit combines two 21mm flanges, duckbill valves, backflow protectors, tubing, and wide-mouth bottles with a travel-cap, delivering a flexible option for varied pumping routines. This is not an original Spectra accessory, but it provides broad compatibility and thoughtful design to support everyday pumping needs.

Why a diverse flange library matters

Every mother is unique. Maymom offers more than a dozen flange sizes (from 13 mm to 36 mm) to fit different shapes and comfort levels. After a pumping session, measure your nipple diameter and choose a size that’s about 1–2 mm larger. This sizing approach prioritizes comfort and a steady pumping rhythm rather than a one-size-fits-all path.

• Comfort across a wide range of sizes with improved fit potential
• Possible smoother expression by reducing pressure gaps
• Interchangeable with Maymom and Spectra components for flexible setups
• Supports diverse configurations, including long- and short-stem backflow protectors

Kit contents and key features

• 2 Wide Mouth Flanges (21mm)
• 2 Duckbill Valves
• 2 Backflow Protectors
• 2 Tubes
• 2 Wide Mouth Bottles with One-Piece Travel Cap

Note: Dome caps and nipples are not included. This Maymom kit is designed to be compatible with Spectra S1/S2 and related models, offering an independent option that does not claim to be original Spectra parts.

Safety, care, and everyday practicality

• Materials are BPA-free and suitable for sanitizing by steam or boiling methods
• Complies with FDA guidelines for plastics in contact with food and liquids

For on-the-go pumping, the wide-mouth bottles and travel-cap provide spill-resistance and convenient storage. The kit’s compatibility with Maymom’s duckbill valves and backflow protectors adds setup flexibility, so you can tailor your workflow to how you pump best, without committing to a single configuration.

How to choose your size and use

Start with the nipple diameter measured after pumping, then select a flange size about 1–2 mm larger. With a broad size range available in Maymom’s lineup, you can experiment to discover a comfortable fit that aligns with your pumping rhythm and daily routine.

Brand and compatibility note

Maymom operates independently from Spectra. This kit is designed to work with Spectra S1/S2 pumps and other compatible Spectra models, expanding your options while remaining separate from original Spectra parts.