---
title: "eufy duckbill valve — Niche Verdict: Skip it (46/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/eufy-duckbill-valve"
last_updated: "2026-07-13T23:05:10.507Z"
locale: en
meta:
  description: "brand-locked demand (top 5 brands take 94% of clicks) — eufy duckbill valve doesn't clear our bar today."
  "og:description": "brand-locked demand (top 5 brands take 94% of clicks) — eufy duckbill valve doesn't clear our bar today."
  "og:title": "eufy duckbill valve — Niche Verdict: Skip it (46/100) | Amazon United States - Flapen"
---

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# **eufy duckbill valve**

**Skip it**

Brand-locked demand (top 5 brands take 94% of clicks) — this niche doesn't clear our bar today.

Market size 17Growth 18Conversion 98Competition 15Returns 85Price range 39Avg price 62Brand share 14Review moat 94Quality gap 88

**Conversion**

**Incredible****17.0%**

search→purchase rate — share of searches ending in a sale

**Review moat**

**Great****128.36**

avg incumbent reviews — the moat a new listing must climb

**Quality gap**

**Great****4.1★**

avg incumbent rating — lower means beatable quality

**Returns**

**Great****1.5%**

return rate — above 6% kills the launch gate

**Avg price**

**Good****$13.45**

avg listing price — sweet spot $15–$100

**Price range**

**Okay****$8.11–$19.44**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Growth**

**Bad****-13.4%**

90-day search growth — must beat 0% to launch

**Market size**

**Bad****$68K**

$68K/yr · 30K searches

**Competition**

**Bad****82%**

top-5 click share — a locked-up shelf

**Brand share**

**Bad****94%**

top-5 brand share — brand-locked demand

## **Competition**

The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**7 **▲rising

**Sellers**

**9**

**Top-5 brand share**

**94%**

**Open market**

**3%**

- eufy Security43% - TOVVILD33% - Goktvai10% - seatenwell4% - Fukaisu4% - BDICOVE3% - Open — no brand owns it (1 brand, 3%)

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%15%$10K30%$20K45%$30K60%$41K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 11 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![eufy Security Original Duckbill Valves (4-Pack) for Wearable Breast Pump E10/E20/S1/S1 Pro Leak-Proof and Dust-Proof Breast Pump Replacement Parts](https://m.media-amazon.com/images/I/21iywF3hEPL.jpg)**eufy Security Original Duckbill Valves (4-Pack) for Wearable Breast Pump E10/E20/S1/S1 Pro Leak-Proof and Dust-Proof Breast Pump Replacement Parts**eufy Security**$18.61**4.6★294 rev](https://www.amazon.com/dp/B0D72VC38X) [2![TOVVILD 8PCS Duckbill Valves Compatible with eufy E10 E20 S1 S1 Pro MomMed S21 S32 Breast Pump Replacement Pump Parts Accessories](https://m.media-amazon.com/images/I/31c1yrKvIjL.jpg)**TOVVILD 8PCS Duckbill Valves Compatible with eufy E10 E20 S1 S1 Pro MomMed S21 S32 Breast Pump Replacement Pump Parts Accessories**TOVVILD**$9.53**4.4★264 rev](https://www.amazon.com/dp/B0DGPP89D5) [3![TOVVILD 12PCS Duckbill Valves Silicone Diaphragms Compatible with eufy E10/E20/S1/S1 Pro Replacement Parts Wearable Breast Pump Accessories](https://m.media-amazon.com/images/I/312AS4p6-OL.jpg)**TOVVILD 12PCS Duckbill Valves Silicone Diaphragms Compatible with eufy E10/E20/S1/S1 Pro Replacement Parts Wearable Breast Pump Accessories**TOVVILD**$19.44**4.1★123 rev](https://www.amazon.com/dp/B0DPPSY1JW) [4![8pcs Replacement Parts for eufy Breast Pump 4 Silicone Diaphragms & 4 Duckbill Valves Accessories Kit Compatible with eufy S1 Pro S1 E10 E20 Wearable Breast Pump](https://m.media-amazon.com/images/I/318MC2mVJTL.jpg)**8pcs Replacement Parts for eufy Breast Pump 4 Silicone Diaphragms & 4 Duckbill Valves Accessories Kit Compatible with eufy S1 Pro S1 E10 E20 Wearable Breast Pump**Goktvai**$14.08**4.6★36 rev](https://www.amazon.com/dp/B0GCD1PGTK) [5![Breast Pump Replacement Parts Kit Compatible with Eufy Electric Wearable Breast Pumps E10 / E20 / S1 / S1 Pro 10PCS Includes 4 Spout Caps 4 Duckbill Valves & 2 Silicone Diaphragms BPA Free](https://m.media-amazon.com/images/I/41fzKmK0nML.jpg)**Breast Pump Replacement Parts Kit Compatible with Eufy Electric Wearable Breast Pumps E10 / E20 / S1 / S1 Pro 10PCS Includes 4 Spout Caps 4 Duckbill Valves & 2 Silicone Diaphragms BPA Free**seatenwell**$10.05**3.9★53 rev](https://www.amazon.com/dp/B0GFCWB6RB)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![4pcs Replacement Valves & 4pcs Spout Caps for eufy Wearable Breast Pump E10/S1/S1 Pro Soft Silicone Duckbill Valves Breast Pump Parts BPA-Free Replacement Accessories Kit](https://m.media-amazon.com/images/I/31UEEJwEftL.jpg)**4pcs Replacement Valves & 4pcs Spout Caps for eufy Wearable Breast Pump E10/S1/S1 Pro Soft Silicone Duckbill Valves Breast Pump Parts BPA-Free Replacement Accessories Kit**Goktvai**$8.11**5 rev5mo ago](https://www.amazon.com/dp/B0GMNX7B2W) [![8pcs Duckbill Valves and 4pcs Silicone Diaphragm Compatible with eufy S1 Pro/S1/E10/E20 Wearable Breast Pump Replace for eufy Pump Parts Not Original Parts](https://m.media-amazon.com/images/I/41T9aIskf8L.jpg)**8pcs Duckbill Valves and 4pcs Silicone Diaphragm Compatible with eufy S1 Pro/S1/E10/E20 Wearable Breast Pump Replace for eufy Pump Parts Not Original Parts**BDICOVE**$15.09**164 rev5mo ago](https://www.amazon.com/dp/B0GHXNLJ2H) [![10pcs Breastpump Kits 6pcs Duckbill Valves and 4pcs Silicone Diaphragms Compatible with eufy S1 Pro/S1/E10/E20 Pump Replace for Lansinoh Discreet Duo/NCVI/NICEGREEN/Nuliie/Zooawa S32 Model Pump](https://m.media-amazon.com/images/I/419b+ULpNlL.jpg)**10pcs Breastpump Kits 6pcs Duckbill Valves and 4pcs Silicone Diaphragms Compatible with eufy S1 Pro/S1/E10/E20 Pump Replace for Lansinoh Discreet Duo/NCVI/NICEGREEN/Nuliie/Zooawa S32 Model Pump**IVARONAL**$15.85**279 rev5mo ago](https://www.amazon.com/dp/B0GHMMPYLM) [![12pcs Breast Pump Parts Replacement for eufy Includes 4 Silicone Diaphragms 4 Duckbill Valves & Nozzle Covers Accessories Kit Compatible with eufy S1 Pro/S1/E10/E20](https://m.media-amazon.com/images/I/31AuYPJ+rvL.jpg)**12pcs Breast Pump Parts Replacement for eufy Includes 4 Silicone Diaphragms 4 Duckbill Valves & Nozzle Covers Accessories Kit Compatible with eufy S1 Pro/S1/E10/E20**Goktvai**$14.11**17 rev5mo ago](https://www.amazon.com/dp/B0GGR6CP3N) [![Breast Pump Replacement Parts Kit Compatible with Eufy Electric Wearable Breast Pumps E10 / E20 / S1 / S1 Pro 10PCS Includes 4 Spout Caps 4 Duckbill Valves & 2 Silicone Diaphragms BPA Free](https://m.media-amazon.com/images/I/41fzKmK0nML.jpg)**Breast Pump Replacement Parts Kit Compatible with Eufy Electric Wearable Breast Pumps E10 / E20 / S1 / S1 Pro 10PCS Includes 4 Spout Caps 4 Duckbill Valves & 2 Silicone Diaphragms BPA Free**seatenwell**$10.05**53 rev6mo ago](https://www.amazon.com/dp/B0GFCWB6RB)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![8pcs Duckbill Valves and 4pcs Silicone Diaphragm Compatible with eufy S1 Pro/S1/E10/E20 Wearable Breast Pump Replace for eufy Pump Parts Not Original Parts](https://m.media-amazon.com/images/I/41T9aIskf8L.jpg)**8pcs Duckbill Valves and 4pcs Silicone Diaphragm Compatible with eufy S1 Pro/S1/E10/E20 Wearable Breast Pump Replace for eufy Pump Parts Not Original Parts**BDICOVE**$15.09**4.1★**▲ 202%**](https://www.amazon.com/dp/B0GHXNLJ2H) [![Breast Pump Replacement Parts Kit Compatible with Eufy Electric Wearable Breast Pumps E10 / E20 / S1 / S1 Pro 10PCS Includes 4 Spout Caps 4 Duckbill Valves & 2 Silicone Diaphragms BPA Free](https://m.media-amazon.com/images/I/41fzKmK0nML.jpg)**Breast Pump Replacement Parts Kit Compatible with Eufy Electric Wearable Breast Pumps E10 / E20 / S1 / S1 Pro 10PCS Includes 4 Spout Caps 4 Duckbill Valves & 2 Silicone Diaphragms BPA Free**seatenwell**$10.05**3.9★**▲ 201%**](https://www.amazon.com/dp/B0GFCWB6RB) [![8pcs Replacement Parts for eufy Breast Pump 4 Silicone Diaphragms & 4 Duckbill Valves Accessories Kit Compatible with eufy S1 Pro S1 E10 E20 Wearable Breast Pump](https://m.media-amazon.com/images/I/318MC2mVJTL.jpg)**8pcs Replacement Parts for eufy Breast Pump 4 Silicone Diaphragms & 4 Duckbill Valves Accessories Kit Compatible with eufy S1 Pro S1 E10 E20 Wearable Breast Pump**Goktvai**$14.08**4.6★**▲ 165%**](https://www.amazon.com/dp/B0GCD1PGTK) [![4pcs Replacement Valves & 4pcs Spout Caps for eufy Wearable Breast Pump E10/S1/S1 Pro Soft Silicone Duckbill Valves Breast Pump Parts BPA-Free Replacement Accessories Kit](https://m.media-amazon.com/images/I/31UEEJwEftL.jpg)**4pcs Replacement Valves & 4pcs Spout Caps for eufy Wearable Breast Pump E10/S1/S1 Pro Soft Silicone Duckbill Valves Breast Pump Parts BPA-Free Replacement Accessories Kit**Goktvai**$8.11**3.4★**▲ 159%**](https://www.amazon.com/dp/B0GMNX7B2W) [![12pcs Breast Pump Parts Replacement for eufy Includes 4 Silicone Diaphragms 4 Duckbill Valves & Nozzle Covers Accessories Kit Compatible with eufy S1 Pro/S1/E10/E20](https://m.media-amazon.com/images/I/31AuYPJ+rvL.jpg)**12pcs Breast Pump Parts Replacement for eufy Includes 4 Silicone Diaphragms 4 Duckbill Valves & Nozzle Covers Accessories Kit Compatible with eufy S1 Pro/S1/E10/E20**Goktvai**$14.11**3.7★**▲ 121%**](https://www.amazon.com/dp/B0GGR6CP3N)

**~~View all trending →~~**

## **Demand**

Weekly Amazon search volume, last 19 weeks — -13.4% search growth over the last 90 days.

700500Mar '26Mar '26Apr '26May '26May '26Jun '26

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Size-Overall**32%

*“Fit perfectly”*

**Quality-Overall**15%

*“The quality seems solid overall”*

**Compatibility-Overall**13%

*“Very compatible”*

**Value For Money**10%

*“Luckily these are cheap”*

**Advertised Vs Actual Product**5%

*“worked as expected”*

**Durability**4%

*“durable”*

**Ease Of Cleaning**3%

*“Having extra parts on hand also makes cleaning”*

**Leak-Proof**2%

*“works seamlessly for a leak-free”*

**Soft Feel**1%

*“The product felt firm”*

**Breastfeeding Friendly**1%

*“These replacement parts for my wifes wearable breast pump work well as replacement pieces”*

### **What buyers complain about **

**Value For Money**15%

*“waste of money”*

**Quality-Overall**14%

*“Low quality”*

**Compatibility-Overall**9%

*“It does not work with Eufy S1”*

**Size-Overall**8%

*“the product does not fit”*

**Functionality-Overall**6%

*“either way the diaphragms did not work”*

**Advertised Vs Actual Product**5%

*“makes it feel incomplete compared to what was advertised”*

**Ease Of Cleaning**5%

*“DONT RECOMMEND- not clean”*

**Durability**5%

*“Quickly Defective”*

**Leak-Proof**5%

*“I experience significant leaking out of the nipple insert holes”*

**Strength**3%

*“theyre flimsy compared to Eufys”*

### **Top return reasons **

**Size-Overall**17%

**Functionality-Overall**16%

**Defective Material/Parts**15%

**Value For Money**12%

**Advertised Vs Actual Product**8%

**Compatibility-Overall**6%

**Leak-Proof**4%

**Color**4%

**Product Condition**4%

**Material Quality**3%