---
title: "3us-pf01 — $39K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/3us-pf01"
last_updated: "2026-08-08T12:18:57.871Z"
locale: en
meta:
description: "Niche score 39/100 · $39K/yr market · 6K searches/yr · $46.51 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 39/100 · $39K/yr market · 6K searches/yr · $46.51 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "3us-pf01 — $39K/yr Amazon US Niche (2026) - Flapen"
---
# **3us-pf01**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 10Growth 17Conversion 97Competition 11Returns 93Price range 95Avg price 94Brand share 0Review moat 48Quality gap 21
**Conversion**
**Incredible****14.6%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Incredible****$28.43–$67.54**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$46.51**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.1%**
return rate — above 5% kills the launch gate
**Review moat**
**Okay****1,746.63**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-15.6%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****86%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$39K**
$39K/yr · 6K searches
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, 3us-pf01 is a $39K/yr Amazon United States market (6K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 39/100.
Data updated Jul 28, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **3us-pf01 market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$35K–$47K**
- units × avg price
- **Conversion rate**
- **14.6%**
- **Avg BSR**
- **#245**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **116 months**
- **Avg seller age**
- **135 days**
## **Competition & brand share**
The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**5 **▼falling
**Sellers**
**23**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**86%**
Top 20: 100%
**Open market**
**0%**
- Waterdrop30% - AQUA CREST26% - Filtrete23% - Filterlogic17% - Waterspecialist3% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 101 weeks — -15.6% search growth over the last 90 days.
200150Spike '24Black Friday '24Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/3us-pf01/trend)
## **Top 3us-pf01 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%10%$4K20%$8K30%$12K40%$15K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 8 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**AQUA CREST 3US-PF01 Water Filter Replacement for Filtrete 3US-PS01 2 Pack**AQUA CREST**$47.28**4.7★1,949 rev](https://www.amazon.com/dp/B01G3T08RG) [2**Filtrete Advanced Under Sink Quick Change Water Filter Replacement 3US-PF01**Filtrete**$58.94**4.7★4,996 rev](https://www.amazon.com/dp/B001DVRR4W) [3**Waterdrop 3US-MAX-F01 3US-PF01 Under Sink Water Filter Replacement for Filtrete 3US-PF01 3US-PS01 Maximum 3US-MAX-S01 Aqua-Pure C-Cyst-FF Manitowoc K-00337 K-00338 NSF/ANSI 42 Certified 2 Pack**Waterdrop**$49.34**4.6★1,760 rev](https://www.amazon.com/dp/B075J8Q4BB) [4**Filterlogic 3US-PF01 3US-MAX-F01 Under Sink Water Filter 2 Pack**Filterlogic**$44.09**4.7★992 rev](https://www.amazon.com/dp/B07Q9Y7RMP) [5**Waterdrop 3US-MAX-F01 3US-PF01 Maximum Under Sink Water Filter**Waterdrop**$30.34**4.6★957 rev](https://www.amazon.com/dp/B089CTG9KN)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Filtrete Advanced Under Sink Quick Change Water Filter Replacement 3US-PF01**Filtrete**$58.94**4,996 rev4y ago](https://www.amazon.com/dp/B001DVRR4W) [**Waterdrop 3US-MAX-F01 3US-PF01 Under Sink Water Filter 3 Pack**Waterdrop**$67.54**1,760 rev6y ago](https://www.amazon.com/dp/B0D2VWK2FF) [**Waterspecialist 3US-PF01 3US-MAX-F01 Under Sink Water Filter 2 Pack**Waterspecialist**$46.09**567 rev6y ago](https://www.amazon.com/dp/B08BFXCQPF) [**Waterdrop 3US-MAX-F01 3US-PF01 Maximum Under Sink Water Filter**Waterdrop**$30.34**957 rev6y ago](https://www.amazon.com/dp/B089CTG9KN) [**Filterlogic 3US-PF01 3US-MAX-F01 Under Sink Water Filter 2 Pack**Filterlogic**$44.09**992 rev7y ago](https://www.amazon.com/dp/B07Q9Y7RMP)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Waterdrop 3US-MAX-F01 3US-PF01 Under Sink Water Filter Replacement for Filtrete 3US-PF01 3US-PS01 Maximum 3US-MAX-S01 Aqua-Pure C-Cyst-FF Manitowoc K-00337 K-00338 NSF/ANSI 42 Certified 2 Pack**Waterdrop**$49.34**4.6★**▲ 40%**](https://www.amazon.com/dp/B075J8Q4BB) [**Waterdrop 3US-MAX-F01 3US-PF01 Under Sink Water Filter 3 Pack**Waterdrop**$67.54**4.6★**▲ 20%**](https://www.amazon.com/dp/B0D2VWK2FF) [**Filterlogic 3US-PF01 3US-MAX-F01 Under Sink Water Filter 2 Pack**Filterlogic**$44.09**4.7★**— 6%**](https://www.amazon.com/dp/B07Q9Y7RMP) [**Filterlogic 3US-PF01 Water Filter Replacement for Filtrete 3US-PS01**Filterlogic**$28.43**4.7★**— 4%**](https://www.amazon.com/dp/B078W26MS6) [**Waterdrop 3US-MAX-F01 3US-PF01 Maximum Under Sink Water Filter**Waterdrop**$30.34**4.6★**— 5%**](https://www.amazon.com/dp/B089CTG9KN)
**~~View all trending →~~**
## **What buyers say about 3us-pf01**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Filtration**28%
*“Good filter”*
**Value For Money**12%
*“Good value”*
**Quality-Overall**10%
*“Dependable unit”*
**Size-Overall**9%
*“Fit good”*
**Assembly/Installation**8%
*“Easy install”*
**Leak-Proof**6%
*“Does not leak”*
**Advertised Vs Actual Product**6%
*“Works as advertised”*
**Ease Of Use**5%
*“Easy to use”*
**Smell**3%
*“It even removes the chlorine smell and taste”*
**Efficiency**2%
*“Effective”*
### **What buyers complain about **
**Filtration**49%
*“No a good filter”*
**Leak-Proof**13%
*“I had a leak issue”*
**Durability**10%
*“Doesn't last”*
**Value For Money**7%
*“These things are expensive”*
**Size-Overall**4%
*“Wont fit-doesnt work”*
**Water Resistance**3%
*“There is zero improvement in water quality”*
### **Top return reasons **
**Size-Overall**42%
**Filtration**20%
**Compatibility-Overall**16%
**Defective Material/Parts**4%
**Advertised Vs Actual Product**3%
**Product Condition**3%
**Value For Money**2%
**Leak-Proof**2%
**Connectivity-Overall**2%
**Functionality-Overall**1%
## **Common questions**
- **Is 3us-pf01 profitable to sell on Amazon United States?**
- The niche generates $39K/yr across 8 tracked products. 90-day search growth is -15.6%. Flapen's verdict: Skip it (39/100).
- **How competitive is the 3us-pf01 niche?**
- 5 brands and 23 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in 3us-pf01?**
- Top complaints mined from reviews: Filtration, Leak-Proof, Durability. The return rate is 1.1%.
- **When does demand for 3us-pf01 peak?**
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- **What does it cost to enter the 3us-pf01 niche?**
- Listings span $28.43–$67.54; the average listing price is $46.51 (sweet spot $15–$100). The average incumbent carries 1,747 reviews — the moat a new listing must climb.
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