eufy duckbill valve
Skip itBrand-locked demand (top 5 brands take 94% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible17.0%search→purchase rate — share of searches ending in a sale
Review moat
Great128.36avg incumbent reviews — the moat a new listing must climb
Quality gap
Great4.1★avg incumbent rating — lower means beatable quality
Returns
Great1.5%return rate — above 5% kills the launch gate
Avg price
Good$13.45avg listing price — sweet spot $15–$100
Price range
Okay$8.11–$19.44cheapest 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
Bad82%top-5 click share — a locked-up shelf
Brand share
Bad94%top-5 brand share — brand-locked demand
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
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.Top eufy duckbill valve search terms
- eufy duckbill valve18K/yr
- eufy s1 duckbill valve4K/yr
- eufy duckbill replacement3K/yr
- eufy s1 pro duckbill valve4K/yr
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.
All 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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$18.614.6★294 rev
TOVVILD 8PCS Duckbill Valves Compatible with eufy E10 E20 S1 S1 Pro MomMed S21 S32 Breast Pump Replacement Pump Parts Accessories
TOVVILD$9.534.4★264 rev
TOVVILD 12PCS Duckbill Valves Silicone Diaphragms Compatible with eufy E10/E20/S1/S1 Pro Replacement Parts Wearable Breast Pump Accessories
TOVVILD$19.444.1★123 rev
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$14.084.6★36 rev
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$10.053.9★53 rev
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$8.115 rev
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$15.09164 rev
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$15.85279 rev
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$14.1117 rev
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$10.0553 rev
Trending
90-day click momentum8pcs 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$15.094.1★
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$10.053.9★
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$14.084.6★
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$8.113.4★
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$14.113.7★
What buyers say about eufy duckbill valve
What buyers praise and complain about, mined from review topics.What buyers love
“Fit perfectly”
“The quality seems solid overall”
“Very compatible”
“Luckily these are cheap”
“worked as expected”
“durable”
“Having extra parts on hand also makes cleaning”
“works seamlessly for a leak-free”
“The product felt firm”
“These replacement parts for my wifes wearable breast pump work well as replacement pieces”
What buyers complain about
“waste of money”
“Low quality”
“It does not work with Eufy S1”
“the product does not fit”
“either way the diaphragms did not work”
“makes it feel incomplete compared to what was advertised”
“DONT RECOMMEND- not clean”
“Quickly Defective”
“I experience significant leaking out of the nipple insert holes”
“theyre flimsy compared to Eufys”
Top return reasons
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.