---
title: "Gp876851 — $59K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/gp876851"
last_updated: "2026-08-09T06:33:43.571Z"
locale: en
meta:
description: "Niche score 43/100 · $59K/yr market · 25K searches/yr · $42.00 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 43/100 · $59K/yr market · 25K searches/yr · $42.00 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Gp876851 — $59K/yr Amazon US Niche (2026) - Flapen"
---
# **gp876851**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 15Growth 50Conversion 63Competition 15Returns 21Price range 95Avg price 95Brand share 0Review moat 72Quality gap 92
**Avg price**
**Incredible****$42.00**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$28.58–$88.98**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Great****4.0★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****636.25**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****5.6%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Good****+20.2%**
90-day search growth — must beat 0% to launch
**Returns**
**Bad****6.1%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$59K**
$59K/yr · 25K searches
**Competition**
**Bad****82%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, gp876851 is a $59K/yr Amazon United States market (25K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jun–Jul. Verdict: Skip it — 43/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **gp876851 market data**
- **Units sold / yr**
- **3K–3K**
- avg 250–500/product
- **Revenue / yr**
- **$105K–$126K**
- units × avg price
- **Conversion rate**
- **5.6%**
- **Avg BSR**
- **#164**
- **Page quality**
- **0%**
- **Prime**
- **88%**
- **Sponsored**
- **75%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **38 months**
- **Avg seller age**
- **154 days**
## **Competition & brand share**
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**5 **—flat
**Sellers**
**64**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**82%**
Top 20: 100%
**Open market**
**0%**
- Kohler43% - Tanxury28% - GREATUS12% - Vayolli8% - nipponAsia8%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +20.2% search growth over the last 90 days.
600400Spike '24Spike '25Prime Day '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jun, Jul · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/gp876851/trend)
## **Top gp876851 search terms**
- **kohler gp876851**8K/yr+43.3%6.9% conv. - **gp876851**7K/yr+10.1%7.8% conv. - **kohler 116995-6**3K/yr+78.3%4.2% conv. - **kohler 1083636**4K/yr-8.3%3.5% conv. - **gp876851 kohler**3K/yr-57.2%6.3% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/gp876851/search-terms)
## **Top gp876851 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%$6K20%$12K30%$18K40%$24K101001K10K 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**GP876851 Mixer Cap and Pressure Balancing Unit Kit Compatible with Kohler Shower Valves K-304 and K-11748 Platforms Shower Cartridge Replacement Repair Kit Include GP800820 and GP77759**Tanxury**$31.90**4.0★141 rev](https://www.amazon.com/dp/B0D8PMLMG1) [2**Kohler GP76851 Repair Kit for Single-Handle Pressure Balance Valve**Kohler**$88.98**4.4★554 rev](https://www.amazon.com/dp/B001GZU9FY) [3**KOHLER GENUINE PART GP77759 MIXER CAP FOR PRESSURE BALANCE 1/2 SHOWER VALVE**Kohler**$30.96**4.5★1,160 rev](https://www.amazon.com/dp/B001GZU1PW) [4**GP76851 Mixer Cap and GP500520 Pressure Balancing Unit Parts Cartridge**GREATUS**$31.07**3.9★768 rev](https://www.amazon.com/dp/B07VZ4WRV2) [5**GP876851 Mixer Cap and Pressure Balancing Cartridge Kit Compatible With Kohler Shower Valves K-304 and K-11748 Platforms Shower Valve Cartridge Replacement Repair Kit Include GP77759 and GP800820**Vayolli**$31.71**3.3★59 rev](https://www.amazon.com/dp/B0DFCV239M)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**GP876851 Mixer Cap and Pressure Balancing Cartridge Kit Compatible With Kohler Shower Valves K-304 and K-11748 Platforms Shower Valve Cartridge Replacement Repair Kit Include GP77759 and GP800820**Vayolli**$31.71**59 rev1y ago](https://www.amazon.com/dp/B0DFCV239M) [**GP876851 Mixer Cap and Pressure Balancing Unit Kit Compatible with Kohler Shower Valves K-304 and K-11748 Platforms Shower Cartridge Replacement Repair Kit Include GP800820 and GP77759**Tanxury**$31.90**141 rev2y ago](https://www.amazon.com/dp/B0D8PMLMG1) [**GP76851 Mixer Cap and GP500520 Pressure Balancing Unit Kit Compatible with Kohler GP77759 GP876851 Part Shower Valve Cartridge Replacement Repair Kit for Rite Temp and 1/2 Shower Valve**Tanxury**$28.58**70 rev2y ago](https://www.amazon.com/dp/B0D2DM37SC) [**GP876851 Mixer Cap and Pressure-Balancing Unit Kit Replacement for Kohler**nipponAsia**$32.19**344 rev5y ago](https://www.amazon.com/dp/B08P1J3M2Q) [**GP76851 Mixer Cap and GP500520 Pressure Balancing Unit Parts Cartridge**GREATUS**$31.07**768 rev6y ago](https://www.amazon.com/dp/B07VZ4WRV2)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**KOHLER GENUINE PART GP77759 MIXER CAP FOR PRESSURE BALANCE 1/2 SHOWER VALVE**Kohler**$30.96**4.5★**▲ 67%**](https://www.amazon.com/dp/B001GZU1PW) [**GP876851 Mixer Cap and Pressure-Balancing Unit Kit Replacement for Kohler**nipponAsia**$32.19**3.9★**▲ 45%**](https://www.amazon.com/dp/B08P1J3M2Q) [**Kohler GP76851 Repair Kit for Single-Handle Pressure Balance Valve**Kohler**$88.98**4.4★**▲ 40%**](https://www.amazon.com/dp/B001GZU9FY) [**GP76851 Mixer Cap and GP500520 Pressure Balancing Unit Kit Compatible with Kohler GP77759 GP876851 Part Shower Valve Cartridge Replacement Repair Kit for Rite Temp and 1/2 Shower Valve**Tanxury**$28.58**3.8★**▲ 28%**](https://www.amazon.com/dp/B0D2DM37SC) [**GP876851 Mixer Cap and Pressure Balancing Unit Kit Compatible with Kohler Shower Valves K-304 and K-11748 Platforms Shower Cartridge Replacement Repair Kit Include GP800820 and GP77759**Tanxury**$31.90**4.0★**▲ 22%**](https://www.amazon.com/dp/B0D8PMLMG1)
**~~View all trending →~~**
## **What buyers say about gp876851**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Assembly/Installation**23%
*“Easy to install”*
**Size-Overall**18%
*“Perfect fit”*
**Quality-Overall**14%
*“The unit seems fine”*
**Advertised Vs Actual Product**9%
*“almost the same”*
**Value For Money**7%
*“Affordable”*
**Leak-Proof**4%
*“fixed the leak”*
**Efficiency**3%
*“It works”*
**Touch/Button Controls**3%
*“the knob turned easier too”*
**Instructions/User Manual/Troubleshooting**3%
*“easy instructions”*
**Product Condition**3%
*“Good as New”*
### **What buyers complain about **
**Leak-Proof**30%
*“Bought 2 both leaked”*
**Durability**16%
*“then it cracks”*
**Size-Overall**11%
*“This fitting does not fit well and cracks”*
**Instructions/User Manual/Troubleshooting**7%
*“And not great instructions”*
**Defective Material/Parts**6%
*“Matched up to old part”*
**Quality-Overall**6%
*“Low quality”*
**Value For Money**5%
*“It's more money”*
**Advertised Vs Actual Product**3%
*“was not an exact footprint”*
**Design-Overall**3%
*“it seems like Kohler made a tweak in the product design”*
**Maintenance And Repair**2%
*“you still have to pull the entire thing out to repair so put in a new one of better quality”*
### **Top return reasons **
**Size-Overall**31%
**Leak-Proof**16%
**Compatibility-Overall**16%
**Defective Material/Parts**14%
**Functionality-Overall**5%
**Advertised Vs Actual Product**5%
**Value For Money**3%
**Product Condition**3%
**Maintenance And Repair**1%
**Assembly/Installation**1%
## **Common questions**
- **Is gp876851 profitable to sell on Amazon United States?**
- The niche generates $59K/yr across 8 tracked products. 90-day search growth is +20.2%. Flapen's verdict: Skip it (43/100).
- **How competitive is the gp876851 niche?**
- 5 brands and 64 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in gp876851?**
- Top complaints mined from reviews: Leak-Proof, Durability, Size-Overall. The return rate is 6.1% — above our launch gate.
- **When does demand for gp876851 peak?**
- Demand peaks in Jun–Jul; the busiest month runs 2.0× the quietest.
- **What does it cost to enter the gp876851 niche?**
- Listings span $28.58–$88.98; the average listing price is $42.00 (sweet spot $15–$100). The average incumbent carries 636 reviews — the moat a new listing must climb.
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