Maymom Pump Parts for Spectra S2/S1/9 Plus – 27mm Flange & Accessories

Discover a versatile aftermarket option from Maymom designed to pair with Spectra S2, S1, and 9 Plus pumps. This kit includes essential parts that create a complete, compact pumping system while offering flexibility in flange sizing and bottle compatibility.

What's inside

• Two 27mm flanges
• Two valves
• Two backflow protectors
• Two tubings

The 27mm flange is crafted with a smoother curvature and a roomier tunnel to minimize flange-back discomfort and to support a more natural pumping rhythm. Note that this size is not intended as a direct substitute for Spectra's 28mm flange; some users report that the 27mm feels larger. If you’re considering a smaller or larger option, Maymom provides several flange sizes (19, 21, 24, 25, 27, 28, 30, 32 mm) to help you compare fit. Be sure to measure your nipple size before purchasing, and refer to the size guide in the product photos.

Design and fit

Designed for a closed system, the kit keeps milk away from the tubing, supporting a clean milk-path during use. It is compatible with Spectra bottles, Avent bottles, and Maymom wide-mouth bottles, specifically for wide-mouth configurations. The kit does not work with other wide-neck bottles, so please review compatibility before pairing with your existing collection.

Care and safety

The parts are BPA-free and prepared for everyday cleaning. They are designed to be cleaned with water, steam, or even gentle boiling. Independent lab tests and reference reports are available for buyers who want to review safety testing. All pieces are intended to be interchangeable with Spectra pump components, so you can use a Maymom flange, backflow protector, valve, and tubing alongside Spectra parts if you choose.

Versatility and use

Whether you’re looking to experiment with a different flange size, or you’re stocking up on spare pieces for reliable pumping, this Maymom kit offers versatility without overcomplicating your setup. Use the included pieces to build a practical, easy-to-clean pumping station that fits with your current Spectra equipment and compatible bottle options. See the size selection guide in the product photos to pick your best fit, and consider the benefits of a smoother flange tunnel and extended reach for your daily routine. This is an aftermarket option meant to complement your existing Spectra system, not a guaranteed solution for every situation.