eufy breast pump replacement parts
Worth a lookShows beatable incumbent ratings (3.9★), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Quality gap
Incredible3.9★avg incumbent rating — lower means beatable quality
Avg price
Incredible$27.89avg listing price — sweet spot $15–$100
Review moat
Great113.4avg incumbent reviews — the moat a new listing must climb
Price range
Great$10.05–$58.56cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great7.3%search→purchase rate — share of searches ending in a sale
Market size
Good$765K$765K/yr · 373K searches
Returns
Good2.2%return rate — above 6% kills the launch gate
Growth
Okay+19.9%90-day search growth — must beat 0% to launch
Competition
Okay57%top-5 click share — leaders hold, buyers still browse
Brand share
Okay89%top-5 brand share — brands hold most of the demand
According to Flapen's Amazon United States niche tracking, eufy breast pump replacement parts is a $765K/yr Amazon United States market (373K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Jan. Verdict: Worth a look — 66/100.
Data updated Jul 12, 2026 · scored weekly · How we score niches
Market data
- Units sold / yr
- 25K–30K
- avg 750–1,000/product
- Revenue / yr
- $697K–$837K
- units × avg price
- Launch success
- 60%
- 6 of 10 new (360d)
- Conversion rate
- 7.3%
- Avg BSR
- #128
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 70%
- Out of stock
- 5.2%
- Avg brand age
- 19 months
- Avg seller age
- 158 days
Competition
The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.Brands
10 rising
Sellers
12
Top-5 brand share
89%
Top 20: 100%
Top-5 click share
57%
Top 20: 100%
Open market
5%
- eufy Security37%
- Wevedk18%
- TOVVILD14%
- Goktvai11%
- seatenwell9%
- IVARONAL6%
- Open — no brand owns it (4 brands, 5%)
Demand & seasonality
Weekly Amazon search volume, last 75 weeks — +19.9% search growth over the last 90 days.Peak months: Jan · busiest ÷ quietest = 2.0×
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 20 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
eufy Security Original 24mm Flange (2-Pack) Replacement Accessories for Wearable Breast Pump E20/S1/S1 Pro HeatFlow Technology Food-Grade Silicone Durable Comfortable Ergonomic Fit
eufy Security$55.794.7★182 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
2 Set Overall Pump Parts and 6pcs 17/19/21mm Flange Insert for eufy E20/S1/S1 Pro Pump Including Non-Heated 24mm Flange Collector Valves Diaphragms 17/19/21mm Inserts 2 Overall-Non-Heated
Wevedk$58.562.1★15 rev
eufy Security Original Diaphragm (2-Pack) for Wearable Breast Pump E10/E20/S1/S1 Pro Food-Grade Silicone Suction Regulation Easy to Clean and Install
eufy Security$18.934.7★275 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
Newest
by launch date
2 Sets Breast Pump Part Kits with 24mm Non-Heated Flange Compatible with eufy S1 Pro/S1/E20 Not for E20 Model Fit for eufy Breast Pump Replacement Parts Diaphragms Valve Collector Flange
Wevedk$58.393 rev
Omni S1 Pro/S1 Accessory Kit for eufy S1 Omni S1 Pro Robot Vacuum Replacement Parts Include 1*Main Roller Brushes 2*Mopping Rollers 6*Side Brushes 4*HEPA Filters 6*Dust Bags 1*Cleaning Tool
Lacvik$32.968 rev
2 Set Overall Pump Parts and 6pcs 17/19/21mm Flange Insert for eufy E20/S1/S1 Pro Pump Including Non-Heated 24mm Flange Collector Valves Diaphragms 17/19/21mm Inserts 2 Overall-Non-Heated
Wevedk$58.5615 rev
2pcs Non-Heated 24mm Flange Replacement Compatible with Eufy E20/S1/S1 Pro Wearable Breast Pump Food-Grade Silicone Durable Comfortable Replaced for eufy Pump Flange
Wevedk$35.341 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
Trending
90-day click momentum2 Sets Breast Pump Part Kits with 24mm Non-Heated Flange Compatible with eufy S1 Pro/S1/E20 Not for E20 Model Fit for eufy Breast Pump Replacement Parts Diaphragms Valve Collector Flange
Wevedk$58.391.8★
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★
2pcs Non-Heated 24mm Flange Replacement Compatible with Eufy E20/S1/S1 Pro Wearable Breast Pump Food-Grade Silicone Durable Comfortable Replaced for eufy Pump Flange
Wevedk$35.341.0★
Omni S1 Pro/S1 Accessory Kit for eufy S1 Omni S1 Pro Robot Vacuum Replacement Parts Include 1*Main Roller Brushes 2*Mopping Rollers 6*Side Brushes 4*HEPA Filters 6*Dust Bags 1*Cleaning Tool
Lacvik$32.964.8★
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★
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Fit perfect”
“The quality seems solid overall”
“Cost effective”
“Very compatible”
“Works exactly as promised”
“it wont leak”
“It is really nice that this also include a cleaning brush, which again, makes it great to keep ready to go”
“durable”
“easy to use”
“The compatibility with models like Eufy Electric Wearable Breast Pump E10, Eufy Electric Wearable Breast Pump E20, Eufy Electric Wearable Breast Pump S1, and Eufy Electric Wearable Breast Pump S1 Pro is accurate—the parts fit properly and function without major issues”
What buyers complain about
“Theyre very tiny”
“they are not completely leak-proof”
“are not the same quality as the originals”
“Not compatible”
“Expensive”
“either way the diaphragms did not work”
“after using them for about a week they were broken in”
“its not the same”
“They feel a bit flimsier than the ones that came with the pump”
“This makes it impossible to pour, measure, or take off without milk spilling EVERYWHERE”
Top return reasons
Common questions
- Is eufy breast pump replacement parts profitable to sell on Amazon United States?
- The niche generates $765K/yr across 20 tracked products. 6 of 10 products launched in the last 360 days are still selling. 90-day search growth is +19.9%. Flapen's verdict: Worth a look (66/100).
- How competitive is the eufy breast pump replacement parts niche?
- 10 brands and 12 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 89% of demand.
- What do buyers complain about in eufy breast pump replacement parts?
- Top complaints mined from reviews: Size-Overall, Leak-Proof, Quality-Overall. The return rate is 2.2%.
- When does demand for eufy breast pump replacement parts peak?
- Demand peaks in Jan; the busiest month runs 2.0× the quietest.
- What does it cost to enter the eufy breast pump replacement parts niche?
- Listings span $10.05–$58.56; the average listing price is $27.89 (sweet spot $15–$100). The average incumbent carries 113 reviews — the moat a new listing must climb.
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