---
product_id: 415324824
title: "21mm Flange and Duckbill Valve Compatible with Spectra S1, S2 and 9 Plus"
brand: "maymom"
price: "$102"
currency: NZD
in_stock: true
reviews_count: 5
category: "Maymom"
url: https://www.desertcart.nz/products/415324824-21mm-flange-and-duckbill-valve-compatible-with-spectra-s1-s2
store_origin: NZ
region: New Zealand
---

# 21mm precision flange size Durable duckbill valve design BPA/DEHP free & FDA compliant 21mm Flange and Duckbill Valve Compatible with Spectra S1, S2 and 9 Plus

**Brand:** maymom
**Price:** $102
**Availability:** ✅ In Stock

## Summary

> 🍼 Upgrade your pump game with Maymom’s precision parts—because your flow deserves the best!

## Quick Answers

- **What is this?** 21mm Flange and Duckbill Valve Compatible with Spectra S1, S2 and 9 Plus by maymom
- **How much does it cost?** $102 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/415324824-21mm-flange-and-duckbill-valve-compatible-with-spectra-s1-s2)

## Best For

- maymom enthusiasts

## Why This Product

- Trusted maymom brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safe & Certified:** BPA/DEHP free, FDA-compliant materials tested by independent labs for peace of mind.
- • **Ergonomic 21mm Flange:** Optimized size for comfort and maximum milk flow efficiency.
- • **Effortless Maintenance:** Dishwasher-safe and withstands boiling, steam, and microwave sterilization.
- • **Seamless Compatibility:** Fits Spectra S1, S2 & 9 Plus pumps flawlessly for hassle-free replacements.
- • **Durable Duckbill Valves:** Easy to install and built to last through countless pumping sessions.

## Overview

Maymom’s 21mm flange and duckbill valve set offers a premium, compatible replacement for Spectra S1, S2, and 9 Plus breast pumps. Engineered for durability and comfort, these BPA/DEHP-free components ensure safe, efficient pumping with easy installation and maintenance. Trusted by thousands, they deliver OEM-level performance without the premium price tag.

## Description

Contents: 2 Flanges and 2 duckbills. Made by Maymom, not by original spectra company. Maymom is not affiliated with Uzinmedicare, the trademark owner of spectra.

Review: Good
Review: These replacement parts for my Spectra S2 were exactly what I needed! The set comes with clear instructions and images, which made swapping everything out super simple, even for someone like me who usually finds pump parts confusing. I especially appreciated the QR codes included; they linked directly to step-by-step instructions and even to individual replacement parts if I ever need to reorder just one piece. The parts themselves feel durable and well-made, and they fit my S2 perfectly without any issues. Everything works smoothly and has held up well after multiple uses and washes. It’s such a relief to have a compatible, high-quality option that makes pumping easier and less stressful. Highly recommend for any Spectra S2 user who wants reliable replacement parts without the guesswork!

## Features

- CONTENTS: 2ct Small 21mm flanges and 2ct duckbill valves compatible with Spectra S2, Spectra S1 and Spectra S1Plus breastpump. Made by Maymom. Not Original Spectra Flanges, Spectra Duckbill Valve. Can use Maymom flange for Spectra S2 pump parts or Maymom valve for Spectra valve replacement. Made by Maymom, not by original spectra company. Maymom is not affiliated with Uzinmedicare, the trademark owner of spectra.
- COMPATIBLE AND INTERCHANGEABLE with Spectra pump parts. Maymom pump parts perform the same suction power as OEM parts, Spectra S2 pump parts, Spectra S1Plus accessories.
- MAYMOM FLANGE can work with Spectra wide-neck bottle (wide-mouth bottle), Avant bottle, and Maymom widemouth bottle. Available Flange sizes:13mm, 15mm, 17mm, 19mm, 21mm, 24mm, 25mm, 27mm, 28mm, 29mm, 30mm, 32mm.
- MAYMOM DUCKBILL VALVES features "easier to plug in and remove", "durable quality" and "color options"
- BPA/DEHP FREE. FDA compliant for food contacts. Tested by independent lab. Test report online available for reference. Products in retail pack sealed by manufacturer. No problem with dishwasher top rack, water steam cleaning, boiling water or microwave-steam bags.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0863NBHRX |
| Additional product features | Closed System |
| Batteries required | No |
| Best Sellers Rank | 44,304 in Baby Products ( See Top 100 in Baby Products ) 857 in Breast Pumps & Accessories |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,025) |
| Date First Available | 19 Mar. 2020 |
| Dishwasher safe | No |
| Item Weight | 80 g |
| Item model number | S012W-FxxDx2 |
| Material Type | Plastic Silicone |
| Model Number | S012W-FxxDx2 |
| Product Dimensions | 14 x 6 x 17 cm; 80 g |
| Style | Compatible |

## Product Details

- **Brand:** Maymom
- **Colour:** White Valve
- **Dishwasher safe?:** No
- **Included components:** Bottle, Valve
- **Item weight:** 0.08 Kilograms
- **Manufacturer:** Maymom
- **Material:** Plastic Silicone
- **Size:** 21 mm Flanges
- **Special feature:** Closed System
- **Style:** Compatible

## Images

![21mm Flange and Duckbill Valve Compatible with Spectra S1, S2 and 9 Plus - Image 1](https://m.media-amazon.com/images/I/81wbohX86oL.jpg)

## Questions & Answers

**Q: will this work with bellababy?**
A: no.  for bellabay, please buy from the following 
https://www.amazon.com/Maymom-Compatible-Bellababy-Double-Electric/dp/B09W2KRSC5/ref=sr_1_2?crid=23GCK9QCNBTGZ&keywords=maymom%2Bbellababy&qid=1676120494&sprefix=maymom%2Bbella%2Caps%2C298&sr=8-2&th=1

**Q: Did anyone have trouble and feel like these ran big?**
A: Yes I definitely felt these ran big as compared to standard spectra. It doesn’t make sense but 19mm was too big when it was the right size in spectra

**Q: I used mine before realizing it’s the wrong flange size, should I still return them?**
A: I did the same thing. I just brought flange inserts that were my nipple size and just pushed it in for the correct sizing. But you can if you want.

**Q: Does this flange work with the Kiinde system?**
A: Yes if you have the Kiinde adapters

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by T***A on 8 January 2026*

Good

### ⭐⭐⭐⭐⭐ Review
*by C***R on 29 August 2025*

These replacement parts for my Spectra S2 were exactly what I needed! The set comes with clear instructions and images, which made swapping everything out super simple, even for someone like me who usually finds pump parts confusing. I especially appreciated the QR codes included; they linked directly to step-by-step instructions and even to individual replacement parts if I ever need to reorder just one piece. The parts themselves feel durable and well-made, and they fit my S2 perfectly without any issues. Everything works smoothly and has held up well after multiple uses and washes. It’s such a relief to have a compatible, high-quality option that makes pumping easier and less stressful. Highly recommend for any Spectra S2 user who wants reliable replacement parts without the guesswork!

### ⭐⭐⭐⭐ Review
*by C***L on 27 September 2024*

Recomendo esta marca, porque realmente é compatível. O material é semelhante ao da Spectra, não noto diferença. Apenas uma nota para quem encomenda o ⌀21mm, encomende um número menor porque eles não tem o ⌀21mm e enviam o ⌀22mm, como podem ver na embalagem.

## Frequently Bought Together

- Maymom 21mm Flange and Duckbill Valve Compatible with Spectra S1 Spectra S2 Spectra 9 Plus Not Original Spectra 20mm Replace Pump Parts Spectra Flange Spectra Duckbill Valve
- Spectra - Wide Neck Baby Bottles - Compatible with Spectra Breast Milk Pump Flanges (Pack of 2)
- Momcozy Hands Free Pumping Bra, Adjustable Breast-Pumps Holding and Nursing Bra, Pumping & Nursing Bra in One

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.nz/products/415324824-21mm-flange-and-duckbill-valve-compatible-with-spectra-s1-s2](https://www.desertcart.nz/products/415324824-21mm-flange-and-duckbill-valve-compatible-with-spectra-s1-s2)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-11*