Maymom Pump Parts Work with Spectra S2 S1 - 21mm Flange Kit

In this review the Maymom Pump Parts kit is considered for parents who use a Spectra S2, Spectra S1 or Spectra 9 Plus breast pump and need a full replacement set of common wear items. The bottom line: this kit offers a complete, compatible set of replacement parts including 21mm flanges, duckbill valves, backflow protectors, tubing and bottles with travel caps, making it a practical buy for someone seeking OEM-equivalent suction and easy sanitizing without paying for brand-name parts. It is best for users who already know the correct flange size.

Key Features

• Compatibility: Works with Spectra S2, Spectra S1 and Spectra 9 Plus pumps for easy interchange of worn parts with the same suction performance as OEM parts.
• Complete kit: Includes 2 flanges (21mm), 2 duckbill valves, 2 backflow protectors, 2 tubes and 2 wide-mouth bottles with one-piece travel caps so you have most routine replacement items in one purchase.
• Multiple flange sizes: Maymom manufactures a wide range of flange sizes so mothers can choose a flange that matches nipple diameter for improved comfort and efficiency.
• Travel-ready bottles: The one-piece cap includes a sealing ring to prevent leaks, which helps when storing or transporting breast milk or converting the bottle into a snack cup.
• Easy to sanitize: Parts are BPA-free and can be sanitized by steam, boiling water or microwave-steam bags in line with food contact regulations.

Who It's For

This kit is a good fit for pump users who need a full set of replacement components that are compatible with Spectra pumps but prefer a lower-cost alternative to original parts. It is especially useful for mothers who know their correct flange size or are willing to measure nipple diameter after a pumping session to select the right fit.

It is less suitable for users who need nipples or dome caps, since those items are not included, or for shoppers who require original-brand packaging or warranty coverage. Also, mothers who are unsure about flange sizing should consider measuring first or consulting a lactation professional before buying.

Pros & Cons

Pros

• Compatible with Spectra pumps and reported to deliver the same suction power as OEM parts.
• Includes most routine replacement parts in one kit, reducing the need to buy items separately.
• Bottles have a secure one-piece travel cap with a sealing ring to prevent spills.
• BPA-free construction and suitable for common sanitizing methods.

Cons

• Does not include nipples or dome caps, so additional purchases may be needed for feeding.
• A few customers reported missing pieces or mixed experiences with flange detachment, so inspect the kit on arrival.

Specifications

Brand	Maymom
Compatible pumps	Spectra S2, Spectra S1, Spectra 9 Plus
Flange size in kit	21mm (two flanges)
Kit contents	2 flanges, 2 duckbill valves, 2 backflow protectors, 2 tubes, 2 bottles with one-piece caps
Material	BPA-free plastic, FDA compliant for food contact
Sanitizing	Safe for steam, boiling water, microwave-steam bags

Our Verdict

The Maymom replacement kit is a practical, value-focused option for Spectra pump owners who need a reliable set of parts with OEM-like suction and easy cleaning. It is a sensible buy for parents who already know their flange size and want bottles with secure travel caps, though buyers should be aware that nipples and dome caps are not supplied and to check the kit on arrival for any missing items.

Frequently Asked Questions

Are these parts truly compatible with Spectra pumps?
Yes. The parts are designed to fit Spectra S2, Spectra S1 and Spectra 9 Plus models and are reported to provide the same suction power as original parts.

Can the bottles be used for travel and storage?
Yes. Each bottle comes with a one-piece cap and sealing ring to prevent leaks and is suitable for storing breast milk or converting to a snack or tumbler.

Are the materials safe to sterilize?
Yes. The kit is BPA-free and can be sanitized with steam, boiling water or microwave-steam bags and complies with FDA regulations for plastics that contact food.