---
title: "Valve — $168K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/baby-products/valve"
last_updated: "2026-08-09T07:43:10.627Z"
locale: en
meta:
description: "Niche score 39/100 · $168K/yr market · 213K searches/yr · $17.79 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 39/100 · $168K/yr market · 213K searches/yr · $17.79 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Valve — $168K/yr Amazon US Niche (2026) - Flapen"
---
# **valve**
**Skip it**
A concentrated shelf (top 5 take 85% of clicks) — this niche doesn't clear our bar today.
Market size 35Growth 13Conversion 54Competition 12Returns 70Price range 81Avg price 82Brand share 13Review moat 37Quality gap 65
**Avg price**
**Great****$17.79**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.68–$41.19**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Good****2.2%**
return rate — above 5% kills the launch gate
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****4.4%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****2,815.7**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Okay****$168K**
$168K/yr · 213K searches
**Growth**
**Bad****-24.9%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****95%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****85%**
top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, valve is a $168K/yr Amazon United States market (213K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Jan–Jun. Verdict: Skip it — 39/100.
Data updated Jul 12, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **valve market data**
- **Units sold / yr**
- **4K–5K**
- avg 250–500/product
- **Revenue / yr**
- **$71K–$89K**
- units × avg price
- **Conversion rate**
- **4.4%**
- **Avg BSR**
- **#71**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **139 days**
## **Competition & brand share**
The top 5 products capture 85% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▲rising
**Sellers**
**13**
**Top-5 brand share**
**95%**
Top 20: 100%
**Top-5 click share**
**85%**
Top 20: 100%
**Open market**
**3%**
- Legendairy Milk65% - Nursi Luna11% - Momcozy8% - Elvie7% - Nuliie4% - Mompmuir3% - Open — no brand owns it (1 brand, 3%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -24.9% search growth over the last 90 days.
6K4KHoliday '24Spike '25Black Friday '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Jun · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/us/baby-products/valve/trend)
## **Top valve search terms**
- **legendary milk flange inserts**66K/yr-26.1%1.0% conv. - **legendairy milk inserts**35K/yr-10.4%0.5% conv. - **legendairy flange inserts**31K/yr-32.0%0.7% conv. - **legendairy milk flanges**13K/yr+22.0%1.0% conv. - **legendairy milk flange insert**25K/yr-64.3%0.7% conv. - **legendairy milk duckbill valves**10K/yr-16.8%13.9% conv. - **legendary flange inserts**9K/yr-33.8%0.5% conv. - **legendairy milk flange inserts**5K/yr+11.1%0.7% conv. - **legendary milk duckbill valves**6K/yr-21.5%13.7% conv. - **legendary milk inserts**5K/yr+3.5%1.0% conv. [**All search terms **](https://flapen.com/research/us/baby-products/valve/search-terms)
## **Top 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%$25K30%$50K45%$76K60%$101K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Legendairy Milk Duckbill Valves with Pull Tab - Compatible with Spectra S1 S2 9 Plus Medela Motif Baby Buddha & Zomee - Duckbill Valve Replacement Pump Parts BPA Free Silicone 6 Pack**Legendairy Milk**$11.76**4.4★1,673 rev](https://www.amazon.com/dp/B08MWQQN6W) [2**Legendairy Milk Pumping Spray 4 oz. Helps Sore Nipples & Clogged Ducts Organic Lubricant for Breast Shields and Flanges Vegan Breast Pump Spray Natural & Lanolin-Free Made in USA**Legendairy Milk**$24.77**4.5★1,557 rev](https://www.amazon.com/dp/B0BYB2C15M) [3**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**4.6★2,006 rev](https://www.amazon.com/dp/B0CKZH37FX) [4**Momcozy 999 Silver Nursing Cups Original Perforated Breathable Design 999 Silver Nipple Cover for Breastfeeding Essential Nipple Shield for Nursing Newborn Metal Nipple Shields Regular Size**Momcozy**$41.19**4.3★691 rev](https://www.amazon.com/dp/B0D66JT3LS) [5**Elvie Nipple Cushions 17mm | Soft-Silicone Nipple Cushions to Enhance fit for Improved Comfort and Efficiency (2 Pack)**Elvie**$20.20**4.2★486 rev](https://www.amazon.com/dp/B0C7FLCLCH)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Momcozy 999 Silver Nursing Cups Original Perforated Breathable Design 999 Silver Nipple Cover for Breastfeeding Essential Nipple Shield for Nursing Newborn Metal Nipple Shields Regular Size**Momcozy**$41.19**691 rev2y ago](https://www.amazon.com/dp/B0D66JT3LS) [**Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping BPA-Free Essential for Moms**Nursi Luna**$9.87**2,081 rev2y ago](https://www.amazon.com/dp/B0CY81WHD5) [**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**2,006 rev2y ago](https://www.amazon.com/dp/B0CKZH37FX) [**Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Essential for Moms**Nuliie**$9.68**4,179 rev2y ago](https://www.amazon.com/dp/B0CMPBBHMZ) [**Legendairy Milk Pumping Spray 4 oz. Helps Sore Nipples & Clogged Ducts Organic Lubricant for Breast Shields and Flanges Vegan Breast Pump Spray Natural & Lanolin-Free Made in USA**Legendairy Milk**$24.77**1,557 rev3y ago](https://www.amazon.com/dp/B0BYB2C15M)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Momcozy 999 Silver Nursing Cups Original Perforated Breathable Design 999 Silver Nipple Cover for Breastfeeding Essential Nipple Shield for Nursing Newborn Metal Nipple Shields Regular Size**Momcozy**$41.19**4.3★**▲ 297%**](https://www.amazon.com/dp/B0D66JT3LS) [**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**4.6★**▲ 53%**](https://www.amazon.com/dp/B0CKZH37FX) [**Durceler 17mm Silicone Flange Inserts Compatible with Medela/for Spectra S1 S2 / Elvie / S18 S21 / Momcozy S9 S12/ TSRETE 24mm Breast Pump Shields or Freemie 25mm; Reduce Nipple Tunnel Down to 17mm**Durceler**$14.59**4.2★**▲ 41%**](https://www.amazon.com/dp/B09MK9NCNN) [**Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Essential for Moms**Nuliie**$9.68**4.6★**▲ 26%**](https://www.amazon.com/dp/B0CMPBBHMZ) [**Legendairy Milk Liquid Gold Lactation Support | Lactation Supplement with Organic Goats Rue Milk Thistle Shatavari Fennel Alfalfa & Anise | Breastfeeding Supplements 1 Pack**Legendairy Milk**$21.18**4.1★**▲ 12%**](https://www.amazon.com/dp/B084GRS9JB)
**~~View all trending →~~**
## **What buyers say about valve**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**18%
*“The best sizing kit”*
**Quality-Overall**14%
*“Good quality”*
**Ease Of Use**10%
*“Easy to take”*
**Breastfeeding Friendly**8%
*“Lactation support”*
**Comfort-Overall**6%
*“So comfortable”*
**Value For Money**6%
*“Good value for money”*
**Ease Of Cleaning**6%
*“its been such a lifesaver for keeping clean”*
**Durability**3%
*“they are pretty durable”*
**Color**3%
*“Love the color”*
**Advertised Vs Actual Product**3%
*“It performs exactly as intended”*
### **What buyers complain about **
**Functionality-Overall**17%
*“Didn't work”*
**Value For Money**10%
*“Not worth it”*
**Size-Overall**9%
*“These are huge”*
**Leak-Proof**8%
*“They all leak”*
**Quality-Overall**4%
*“Poor Quality”*
**Comfort-Overall**3%
*“Very uncomfortable”*
**Acid Regulator/Stomach Ache Relief**3%
*“stomach pain Ive ever had”*
**Durability**3%
*“when I was drying them after a clean they bent easily”*
**Regulates Digestion**3%
*“baby very gassy”*
**Taste-Overall**2%
*“Doesn't have a taste”*
### **Top return reasons **
**Size-Overall**46%
**Functionality-Overall**9%
**Leak-Proof**9%
**Advertised Vs Actual Product**5%
**Defective Material/Parts**5%
**Value For Money**3%
**Comfort-Overall**3%
**Breastfeeding Friendly**3%
**Motor Power**2%
**Material Quality**2%
## **Common questions**
- **Is valve profitable to sell on Amazon United States?**
- The niche generates $168K/yr across 10 tracked products. 90-day search growth is -24.9%. Flapen's verdict: Skip it (39/100).
- **How competitive is the valve niche?**
- 7 brands and 13 sellers compete. The top 5 products take 85% of clicks and top 5 brands hold 95% of demand.
- **What do buyers complain about in valve?**
- Top complaints mined from reviews: Functionality-Overall, Value For Money, Size-Overall. The return rate is 2.2%.
- **When does demand for valve peak?**
- Demand peaks in Jan–Jun; the busiest month runs 2.0× the quietest.
- **What does it cost to enter the valve niche?**
- Listings span $9.68–$41.19; the average listing price is $17.79 (sweet spot $15–$100). The average incumbent carries 2,816 reviews — the moat a new listing must climb.
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