---
title: "Eufy Duckbill Valve — $68K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/baby-products/eufy-duckbill-valve"
last_updated: "2026-08-09T14:25:42.286Z"
locale: en
meta:
description: "Niche score 46/100 · $68K/yr market · 30K searches/yr · $13.45 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · $68K/yr market · 30K searches/yr · $13.45 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Eufy Duckbill Valve — $68K/yr Amazon US Niche (2026) - Flapen"
---
# **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 5% 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
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United States niche tracking, eufy duckbill valve is a $68K/yr Amazon United States market (30K searches/yr). The top 5 brands hold 94% of demand. Verdict: Skip it — 46/100.
Data updated Jul 12, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **eufy duckbill valve market data**
- **Units sold / yr**
- **5K–6K**
- avg 500–750/product
- **Revenue / yr**
- **$67K–$81K**
- units × avg price
- **Conversion rate**
- **17.0%**
- **Avg BSR**
- **#190**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **91%**
- **Out of stock**
- **12.5%**
- **Avg brand age**
- **25 months**
- **Avg seller age**
- **273 days**
## **Competition & brand share**
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%**
Top 20: 100%
**Top-5 click share**
**82%**
Top 20: 100%
**Open market**
**3%**
- eufy Security43% - TOVVILD33% - Goktvai10% - seatenwell4% - Fukaisu4% - BDICOVE3% - Open — no brand owns it (1 brand, 3%)
## **Demand**
Weekly Amazon search volume, last 19 weeks — -13.4% search growth over the last 90 days.
700500Mar '26Mar '26Apr '26May '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/us/baby-products/eufy-duckbill-valve/trend)
## **Top eufy duckbill valve search terms**
- **eufy duckbill valve**18K/yr-17.8%15.8% conv. - **eufy s1 duckbill valve**4K/yr-6.3%13.8% conv. - **eufy duckbill replacement**3K/yr+17.6%13.5% conv. - **eufy s1 pro duckbill valve**4K/yr-24.4%16.6% conv. [**All search terms **](https://flapen.com/research/us/baby-products/eufy-duckbill-valve/search-terms)
## **Top eufy duckbill valve products on Amazon**
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**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**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**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**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**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**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**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**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**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**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**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**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**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**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**Goktvai**$14.11**3.7★**▲ 121%**](https://www.amazon.com/dp/B0GGR6CP3N)
**~~View all trending →~~**
## **What buyers say about eufy duckbill valve**
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%
## **Common questions**
- **Is eufy duckbill valve profitable to sell on Amazon United States?**
- The niche generates $68K/yr across 11 tracked products. 3 of 7 products launched in the last 360 days are still selling. 90-day search growth is -13.4%. Flapen's verdict: Skip it (46/100).
- **How competitive is the eufy duckbill valve niche?**
- 7 brands and 9 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 94% of demand.
- **What do buyers complain about in eufy duckbill valve?**
- Top complaints mined from reviews: Value For Money, Quality-Overall, Compatibility-Overall. The return rate is 1.5%.
- **What does it cost to enter the eufy duckbill valve niche?**
- Listings span $8.11–$19.44; the average listing price is $13.45 (sweet spot $15–$100). The average incumbent carries 128 reviews — the moat a new listing must climb.
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