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HomeBreast Pump Parts

10 Best Breast Pump Parts Of 2026

Breast Pump Parts — Reviews, Recommendations & Updated Buying Guide May 2026

Sort:
🏆Our Top Pick
SYOSI 5Pcs Silicone Flange Inserts 13/15/17/19/21mm
01
9.9
Exceptional
(1,603 reviews)
🔥 9 interested

SYOSI 5Pcs Silicone Flange Inserts 13/15/17/19/21mm

SYOSI
DISCOUNTED TODAY

Why We Love It

The best universal fit with 13/15/17/19/21mm sizing options
Transforms oversized 24mm shields into perfectly customized comfort
Top pick for Momcozy, Medela, and Willow pump compatibility
9.9
Exceptional
(1,603 reviews)
🔥 9 interested
Available at AmazonShow Offer
MAKINGTEC Duckbill Valves and Silicone Diaphragm for Momcozy M5 Wearable Breast Pump
02
9.6
Exceptional
(1,170 reviews)

MAKINGTEC Duckbill Valves and Silicone Diaphragm for Momcozy M5 Wearable Breast Pump

MAKINGTEC
DISCOUNTED TODAY

Why We Love It

Outstanding choice with 6-piece valve and diaphragm set
Exceptional pick engineered specifically for Momcozy M5 wearables
Premium replacement parts restore suction power instantly
9.6
Exceptional
(1,170 reviews)
Available at AmazonShow Offer
SKEIDO Milk Nursing Pump Wearable Breast Extractor Pumper Include 4pcs Duckbill Valve & 2pcs Silicone Diaphragm Lactation Collector Cup Part Replacement for NCVI Zooawa Nuliie S32
03
9.3
Excellent
(5,052 reviews)

SKEIDO Milk Nursing Pump Wearable Breast Extractor Pumper Include 4pcs Duckbill Valve & 2pcs Silicone Diaphragm Lactation Collector Cup Part Replacement for NCVI Zooawa Nuliie S32

SKEIDO
DISCOUNTED TODAY

Why We Love It

Compact size fits any diaper bag
Straightforward operation needs no learning curve
Lightweight design travels with you everywhere
9.3
Excellent
(5,052 reviews)
Available at AmazonShow Offer
Breast Pump Accessories
04
9.1
Excellent
(5,253 reviews)

Breast Pump Accessories

Breast
DISCOUNTED TODAY

Why We Love It

Excellent option compatible with most major pump brands
BPA and DEHP-free materials protect your milk supply
Strong performer with 6 duckbill valves included
9.1
Excellent
(5,253 reviews)
Available at AmazonShow Offer
Replacement Parts Full Set - Compatible with Spectra S1 S2 9 Plus - Includes 24mm Flanges
05
8.9
Very Good
(1,872 reviews)

Replacement Parts Full Set - Compatible with Spectra S1 S2 9 Plus - Includes 24mm Flanges

Replacement
DISCOUNTED TODAY

Why We Love It

Excellent comprehensive solution for Spectra S1 S2 9 Plus users
Complete 24mm flange set eliminates multiple separate purchases
Strong performer including tubing and backflow protectors
8.9
Very Good
(1,872 reviews)
Available at AmazonShow Offer
Maymom Breast Pump Kit Compatible with Medela Pump in Style Advanced Breast Pumps;2 Breastshields (one-piece
06
8.7
Very Good
(4,956 reviews)

Maymom Breast Pump Kit Compatible with Medela Pump in Style Advanced Breast Pumps;2 Breastshields (one-piece

Maymom
DISCOUNTED TODAY

Why We Love It

Reliable pick with genuine Medela Pump in Style compatibility
Solid choice bundling 2 breastshields, 4 valves, 6 membranes
Complete kit replaces multiple worn components at once
8.7
Very Good
(4,956 reviews)
Available at AmazonShow Offer
KASTWAVE Pump Parts 2Pcs Silicone Flange Inserts 15mm
07
8.5
Very Good
(796 reviews)

KASTWAVE Pump Parts 2Pcs Silicone Flange Inserts 15mm

KASTWAVE
DISCOUNTED TODAY

Why We Love It

Reliable 15mm silicone flange inserts for precision fit
Solid choice supporting Momcozy, Medela, Willow systems
Durable silicone construction withstands daily pumping
8.5
Very Good
(796 reviews)
Available at AmazonShow Offer
10PCS Flange Sizing Kit 13/15/17/19/21mm for 24mm Flange/Shield of Most Pumps
08
8.4
Good
(3,585 reviews)

10PCS Flange Sizing Kit 13/15/17/19/21mm for 24mm Flange/Shield of Most Pumps

DISCOUNTED TODAY

Why We Love It

Smart budget pick with complete 13/15/17/19/21mm sizing kit
Great entry-level solution for finding your perfect fit
10-piece set handles most electric breast pump brands
8.4
Good
(3,585 reviews)
Available at AmazonShow Offer
Flange Shield 24mm and Duckbill Valve and Silicone Diaphragm and Milk Collector Cup Set for Breast Pump Parts Replacement Accessories for MOMMED for Mumgaroo for MISSAA for Bioby S18 S21 4 Pcs
09
8.2
Good
(1,449 reviews)

Flange Shield 24mm and Duckbill Valve and Silicone Diaphragm and Milk Collector Cup Set for Breast Pump Parts Replacement Accessories for MOMMED for Mumgaroo for MISSAA for Bioby S18 S21 4 Pcs

Flange
DISCOUNTED TODAY

Why We Love It

Smart budget pick with 4-piece accessory bundle included
Great entry-level 24mm flange shield replacement set
Works across MOMMED, Mumgaroo, MISSAA, and Bioby models
8.2
Good
(1,449 reviews)
Available at AmazonShow Offer
Medela - Valve & Membranes (Blister Pck)
10
8
Good
(1,216 reviews)

Medela - Valve & Membranes (Blister Pck)

Medela
DISCOUNTED TODAY

Why We Love It

Smart budget pick from trusted Medela brand heritage
Great entry-level valve and membrane replacement blister pack
Authentic parts engineered for Medela pump systems
8
Good
(1,216 reviews)
Available at AmazonShow Offer

Quick Pick

10 Best Breast Pump Parts Of 2026

Quick Pick

#1
SYOSI 5Pcs Silicone Flange Inserts 13/15/17/19/21mm, for Momcozy, Medela, Willow S9/S10/S12 Wearable Hand Free Breast Pump Flange Insert, Reduce 24mm Shield/Flange Nipple Tunnel Down to Correct Size

SYOSI 5Pcs Silicone Flange Inserts 13/15/17/19/21mm, for Momcozy, Medela, Willow S9/S10/S12 Wearable Hand Free Breast Pump Flange Insert, Reduce 24mm Shield/Flange Nipple Tunnel Down to Correct Size

View Details
#2
MAKINGTEC Duckbill Valves and Silicone Diaphragm for Momcozy M5 Wearable Breast Pump, Replacement Pump Parts Accessories Compatible for Momcozy M5 6 Pcs

MAKINGTEC Duckbill Valves and Silicone Diaphragm for Momcozy M5 Wearable Breast Pump, Replacement Pump Parts Accessories Compatible for Momcozy M5 6 Pcs

View Details
#3
SKEIDO Milk Nursing Pump Wearable Breast Extractor Pumper Include 4pcs Duckbill Valve & 2pcs Silicone Diaphragm Lactation Collector Cup Part Replacement for NCVI Zooawa Nuliie S32

SKEIDO Milk Nursing Pump Wearable Breast Extractor Pumper Include 4pcs Duckbill Valve & 2pcs Silicone Diaphragm Lactation Collector Cup Part Replacement for NCVI Zooawa Nuliie S32

View Details
#4
Breast Pump Accessories, Duckbill Valves for Most Breast Pumps, Replacement Silicone Duckbill Valves, BPA/DEHP Free (6 Pack)

Breast Pump Accessories, Duckbill Valves for Most Breast Pumps, Replacement Silicone Duckbill Valves, BPA/DEHP Free (6 Pack)

View Details
#5
Replacement Parts Full Set - Compatible with Spectra S1 S2 9 Plus - Includes 24mm Flanges, Duckbill Valves, Tubing, Backflow Protectors, Bottles

Replacement Parts Full Set - Compatible with Spectra S1 S2 9 Plus - Includes 24mm Flanges, Duckbill Valves, Tubing, Backflow Protectors, Bottles

View Details
#6
Maymom Breast Pump Kit Compatible with Medela Pump in Style Advanced Breast Pumps;2 Breastshields (one-piece, 25mm), 4 Valve, 6 Membrane, & 2 Pump-in-Style Tubing Can Replace Medela Pumpin Style Valve

Maymom Breast Pump Kit Compatible with Medela Pump in Style Advanced Breast Pumps;2 Breastshields (one-piece, 25mm), 4 Valve, 6 Membrane, & 2 Pump-in-Style Tubing Can Replace Medela Pumpin Style Valve

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#7
KASTWAVE Pump Parts 2Pcs Silicone Flange Inserts 15mm, for Momcozy, Medela, Willow S9/S10/S12 Wearable Hand Free Breast Pump Flange Insert

KASTWAVE Pump Parts 2Pcs Silicone Flange Inserts 15mm, for Momcozy, Medela, Willow S9/S10/S12 Wearable Hand Free Breast Pump Flange Insert

View Details
#8
10PCS Flange Sizing Kit 13/15/17/19/21mm for 24mm Flange/Shield of Most Pumps, Silicone Flanges Insert for Momcozy Electric Breast Pumps, Pumping Essential Kit for Moms

10PCS Flange Sizing Kit 13/15/17/19/21mm for 24mm Flange/Shield of Most Pumps, Silicone Flanges Insert for Momcozy Electric Breast Pumps, Pumping Essential Kit for Moms

View Details
#9
Flange Shield 24mm and Duckbill Valve and Silicone Diaphragm and Milk Collector Cup Set for Breast Pump Parts Replacement Accessories for MOMMED for Mumgaroo for MISSAA for Bioby S18 S21 4 Pcs

Flange Shield 24mm and Duckbill Valve and Silicone Diaphragm and Milk Collector Cup Set for Breast Pump Parts Replacement Accessories for MOMMED for Mumgaroo for MISSAA for Bioby S18 S21 4 Pcs

View Details
#10
Medela - Valve & Membranes (Blister Pck)

Medela - Valve & Membranes (Blister Pck)

View Details

Buying Guide: Breast Pump Parts

📋 Table of Contents

  1. 1.How do I know which flange size I need for my breast pump?
  2. 2.What's the difference between standard and wide-neck bottles for breast pumps?
  3. 3.How often should I replace breast pump valves and membranes?
  4. 4.Is it worth buying original manufacturer parts instead of generic alternatives?
  5. 5.What capacity storage bottles should I get for my breast pump?

1How do I know which flange size I need for my breast pump?

Flange size matters because an incorrect fit reduces milk output and causes discomfort. Measure your nipple diameter (not including the areola) and add 4mm to get your ideal size—most people need 24mm, 27mm, or 30mm, though some need larger. Many pumps come with multiple flange sizes, so check what's included before buying replacement parts.

2What's the difference between standard and wide-neck bottles for breast pumps?

Wide-neck bottles have a larger opening, making them easier to clean and fill, while standard necks are more compact and fit more pumps. If you struggle with cleaning or have limited storage space, wide-neck is worth considering—just verify your pump is compatible before buying.

3How often should I replace breast pump valves and membranes?

Valves and membranes typically need replacing every 2-4 weeks depending on use, or sooner if they look worn, cracked, or don't create proper suction. Buying replacement sets in bulk saves money and ensures you always have fresh parts on hand, which directly impacts pumping efficiency.

4Is it worth buying original manufacturer parts instead of generic alternatives?

Original parts guarantee compatibility and suction quality, which affects milk supply and pumping comfort—generic versions sometimes fail to seal properly and may damage your pump. If you're experiencing suction loss or discomfort, investing in genuine replacements is usually more cost-effective than replacing the entire pump later.

5What capacity storage bottles should I get for my breast pump?

Choose bottle capacity based on your pumping sessions: 150ml bottles work for quick sessions, while 250ml+ bottles suit longer pumping or feeding-free days. Consider your storage space and how often you wash bottles—larger bottles mean fewer changes but take up more room.

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