---
title: "Gp800820 — $29K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/gp800820"
last_updated: "2026-08-09T05:47:34.281Z"
locale: en
meta:
description: "Niche score 38/100 · $29K/yr market · 8K searches/yr · $31.22 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · $29K/yr market · 8K searches/yr · $31.22 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Gp800820 — $29K/yr Amazon US Niche (2026) - Flapen"
---
# **gp800820**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 7Growth 17Conversion 95Competition 8Returns 20Price range 95Avg price 95Brand share 0Review moat 89Quality gap 79
**Conversion**
**Incredible****12.3%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Incredible****$31.22**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$16.83–$67.84**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****212.86**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Returns**
**Bad****6.3%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-16.3%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****90%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$29K**
$29K/yr · 8K searches
**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, gp800820 is a $29K/yr Amazon United States market (8K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 38/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **gp800820 market data**
- **Units sold / yr**
- **2K–2K**
- avg 100–250/product
- **Revenue / yr**
- **$47K–$62K**
- units × avg price
- **Conversion rate**
- **12.3%**
- **Avg BSR**
- **#211**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **86%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **55 months**
- **Avg seller age**
- **159 days**
## **Competition & brand share**
The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**5 **▲rising
**Sellers**
**43**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**90%**
Top 20: 100%
**Open market**
**0%**
- Kohler50% - Tanxury25% - nipponAsia10% - Edifla8% - Vayolli7%
## **Demand**
Weekly Amazon search volume, last 8 weeks — -16.3% search growth over the last 90 days.
150100Jun '26Jun '26Jun '26Jun '26Jul '26Jul '26Jul '26Jul '26
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/gp800820/trend)
## **Top gp800820 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%$4K30%$9K45%$13K60%$17K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 7 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Kohler Genuine Part GP800820 Rite-Temp Pressure-Balancing Unit Cartridge SINGLE**Kohler**$34.71**4.5★882 rev](https://www.amazon.com/dp/B07JZ7YQRT) [2**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) [3**GP800820 Pressure Balancing Unit Cartridge Compatible with Kohler GP500520 Shower Cartridge Replacement for Rite-Temp 1/2 Shower Valve and K-304 K-11748 Platforms**Tanxury**$16.83**4.7★9 rev](https://www.amazon.com/dp/B0D2DQ5752) [4**1307346 Mixer Cap Sp Kit and GP800820 Pressure Balancing Unit Cartridge Compatible with Kohler Shower Valve Shower Cartridge Repair Kit for Rite-Temp and K-304 Shower Valve Retro**Edifla**$67.84**4.3★7 rev](https://www.amazon.com/dp/B0G2L8CHHN) [5**GP800820 Pressure Balancing Unit Cartridge Compatible With Kohler GP800820 Cartridge Shower Cartridge Replacement for Rite-Temp Shower Valve and K-304 K-11748 Platforms**Vayolli**$17.41**4.4★16 rev](https://www.amazon.com/dp/B0D1C5KVS8)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**1307346 Mixer Cap Sp Kit and GP800820 Pressure Balancing Unit Cartridge Compatible with Kohler Shower Valve Shower Cartridge Repair Kit for Rite-Temp and K-304 Shower Valve Retro**Edifla**$67.84**7 rev8mo ago](https://www.amazon.com/dp/B0G2L8CHHN) [**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) [**GP800820 Pressure Balancing Unit Cartridge Compatible with Kohler GP500520 Shower Cartridge Replacement for Rite-Temp 1/2 Shower Valve and K-304 K-11748 Platforms**Tanxury**$16.83**9 rev2y ago](https://www.amazon.com/dp/B0D2DQ5752) [**GP800820 Pressure Balancing Unit Cartridge Compatible With Kohler GP800820 Cartridge Shower Cartridge Replacement for Rite-Temp Shower Valve and K-304 K-11748 Platforms**Vayolli**$17.41**16 rev2y ago](https://www.amazon.com/dp/B0D1C5KVS8) [**GP876851 Mixer Cap and Pressure-Balancing Unit Kit Replacement for Kohler**nipponAsia**$32.19**344 rev5y ago](https://www.amazon.com/dp/B08P1J3M2Q)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**1307346 Mixer Cap Sp Kit and GP800820 Pressure Balancing Unit Cartridge Compatible with Kohler Shower Valve Shower Cartridge Repair Kit for Rite-Temp and K-304 Shower Valve Retro**Edifla**$67.84**4.3★**▲ 152%**](https://www.amazon.com/dp/B0G2L8CHHN) [**GP800820 Pressure Balancing Unit Cartridge Compatible with Kohler GP500520 Shower Cartridge Replacement for Rite-Temp 1/2 Shower Valve and K-304 K-11748 Platforms**Tanxury**$16.83**4.7★**▲ 96%**](https://www.amazon.com/dp/B0D2DQ5752) [**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★**▲ 70%**](https://www.amazon.com/dp/B0D8PMLMG1) [**Kohler Genuine Part GP800820 Rite-Temp Pressure-Balancing Unit Cartridge SINGLE**Kohler**$34.71**4.5★**— 7%**](https://www.amazon.com/dp/B07JZ7YQRT) [**GP800820 Pressure Balancing Unit Cartridge Compatible With Kohler GP800820 Cartridge Shower Cartridge Replacement for Rite-Temp Shower Valve and K-304 K-11748 Platforms**Vayolli**$17.41**4.4★**▼ 19%**](https://www.amazon.com/dp/B0D1C5KVS8)
**~~View all trending →~~**
## **What buyers say about gp800820**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Assembly/Installation**18%
*“good instructions and fairly easy to install”*
**Quality-Overall**15%
*“The unit seems fine”*
**Size-Overall**14%
*“Perfect fit”*
**Advertised Vs Actual Product**11%
*“Part itself is as described”*
**Value For Money**7%
*“Thats so much cheaper than original Kohler products”*
**Maintenance And Repair**6%
*“Thank you for a low cost to fix an otherwise expensive repair”*
**Efficiency**6%
*“Works like it should”*
**Compatibility-Overall**4%
*“Worked with my Kohler shower setup. No issues so far!”*
**Ease Of Use**4%
*“it was very easy to do”*
**Leak-Proof**3%
*“So far so good, leak-less install”*
### **What buyers complain about **
**Leak-Proof**25%
*“second it leaked copious amounts of water”*
**Durability**19%
*“Failed after 4 months”*
**Size-Overall**13%
*“Questionable fitment”*
**Advertised Vs Actual Product**8%
*“was not an exact footprint”*
**Design-Overall**8%
*“it seems like Kohler made a tweak in the product design”*
**Instructions/User Manual/Troubleshooting**7%
*“Only thing is it didn't come with any paper instructions”*
**Value For Money**3%
*“Not worth the discount”*
**Maintenance And Repair**3%
*“I had to reassemble it”*
### **Top return reasons **
**Size-Overall**32%
**Compatibility-Overall**17%
**Leak-Proof**16%
**Defective Material/Parts**11%
**Advertised Vs Actual Product**9%
**Functionality-Overall**4%
**Value For Money**3%
**Product Condition**2%
**Assembly/Installation**1%
**Water Resistance**1%
## **Common questions**
- **Is gp800820 profitable to sell on Amazon United States?**
- The niche generates $29K/yr across 7 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -16.3%. Flapen's verdict: Skip it (38/100).
- **How competitive is the gp800820 niche?**
- 5 brands and 43 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in gp800820?**
- Top complaints mined from reviews: Leak-Proof, Durability, Size-Overall. The return rate is 6.3% — above our launch gate.
- **What does it cost to enter the gp800820 niche?**
- Listings span $16.83–$67.84; the average listing price is $31.22 (sweet spot $15–$100). The average incumbent carries 213 reviews — the moat a new listing must climb.
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