---
title: "Sp21058 — $75K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/sp21058"
last_updated: "2026-08-06T23:27:19.631Z"
locale: en
meta:
description: "Niche score 48/100 · $75K/yr market · 19K searches/yr · $42.25 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · $75K/yr market · 19K searches/yr · $42.25 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Sp21058 — $75K/yr Amazon US Niche (2026) - Flapen"
---
# **sp21058**
**Skip it**
A small market ($75K/yr) — this niche doesn't clear our bar today.
Market size 19Growth 25Conversion 84Competition 22Returns 20Price range 95Avg price 95Brand share 53Review moat 97Quality gap 84
**Review moat**
**Incredible****59.31**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Incredible****$42.25**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$25.96–$68.08**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****9.3%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Good****73%**
top-5 brand share — brands hold most of the demand
**Growth**
**Bad****-0.2%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****73%**
top-5 click share — a locked-up shelf
**Returns**
**Bad****6.5%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$75K**
$75K/yr · 19K searches
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, sp21058 is a $75K/yr Amazon United States market (19K searches/yr). The top 5 brands hold 73% of demand. Demand peaks in Jul. Verdict: Skip it — 48/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **sp21058 market data**
- **Units sold / yr**
- **1K–2K**
- avg 0–100/product
- **Revenue / yr**
- **$53K–$63K**
- units × avg price
- **Conversion rate**
- **9.3%**
- **Avg BSR**
- **#11,046**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **1.1%**
- **Avg brand age**
- **25 months**
- **Avg seller age**
- **197 days**
## **Competition & brand share**
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**13 **▲rising
**Sellers**
**15**
**Top-5 brand share**
**73%**
Top 20: 100%
**Top-5 click share**
**73%**
Top 20: 100%
**Open market**
**22%**
- JURPLIX36% - Pontuss14% - TT Tokuein10% - Hoeine8% - YDHFTYS5% - Redants5%
## **Demand & seasonality**
Weekly Amazon search volume, last 65 weeks — -0.2% search growth over the last 90 days.
450350Spike '25Spike '26Prime Day '26 seasonMayJunJulAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: Jul · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/sp21058/trend)
## **Top sp21058 search terms**
- **rheem pilot assembly kit**6K/yr+45.4%4.9% conv. - **sp21058**6K/yr+1.9%9.2% conv. - **rheem pilot assembly**4K/yr-47.8%5.7% conv. - **rheem water heater pilot assembly**3K/yr-42.3%4.6% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/sp21058/search-terms)
## **Top sp21058 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%$8K20%$15K30%$23K40%$30K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**SP21058 SP20824 Pilot Assembly for Water Heater Parts with Thermopile & Sparker**JURPLIX**$41.12**4.4★41 rev](https://www.amazon.com/dp/B0G56B6YWP) [2**Upgraded SP20075 Pilot and Igniter Assembly Compatible with Rheem Water Heater Pilot Assembly PROTECH GE Richmond Water Heater Pilot Assembly Water Heater Pilot Assembly for Natural Gas**Pontuss**$26.06**4.2★221 rev](https://www.amazon.com/dp/B0BPCCD45P) [3**SP20824 Pilot Assembly for Water Heater Parts Compatible with Rheem Ruud**TT Tokuein**$38.66**3.8★8 rev](https://www.amazon.com/dp/B0F31ZX42P) [4**Hoeine SP21058 Pilot Assembly Kit with Thermopile for Rheem Water Heater**Hoeine**$44.31**4.0★40 rev](https://www.amazon.com/dp/B0FH7JPGCN) [5**SP21058 Pilot Assembly Replacement Kit for Rheem Water Heater Parts Compatible with Select Rheem & Ruud Gas Water Heaters Complete Water Heater Pilot Burner Assembly Thermopile Thermocouple etc.**YDHFTYS**$61.44**3.0★13 rev](https://www.amazon.com/dp/B0G4QXRH13)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**SP21058 Replacement for Rheem Pilot Assembly Compatible with Select Rheem Ruud Water Heaters Replacement for Water Heater Parts Water Heater Burner Assembly with Thermopile and Thermocouple**VitaFlow Tool**$48.82**5 rev2mo ago](https://www.amazon.com/dp/B0FY25BBYX) [**SP21058 SP20824 Pilot Assembly for Water Heater Parts with Thermopile & Sparker**JURPLIX**$41.12**41 rev7mo ago](https://www.amazon.com/dp/B0G56B6YWP) [**SP21058 Pilot Assembly Replacement Kit for Rheem Water Heater Parts Compatible with Select Rheem & Ruud Gas Water Heaters Complete Water Heater Pilot Burner Assembly Thermopile Thermocouple etc.**YDHFTYS**$61.44**13 rev7mo ago](https://www.amazon.com/dp/B0G4QXRH13) [**Water Heater Pilot Assembly Fit for Rheem Ruud Richmond SP20754 SP21058 SP21059 SP20800 NG/LP Universal Burner Ignition Replacement Kit with Thermopile and Sparker**Quwfesudy**$39.95**7 rev9mo ago](https://www.amazon.com/dp/B0FW9ZG335) [**SP21058 SP20824 Pilot Burner Assembly Replacement Kit**Sejaede**$41.33**7 rev10mo ago](https://www.amazon.com/dp/B0FT7LZ19Q)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**SP21058 SP20824 Pilot Assembly for Water Heater Parts with Thermopile & Sparker**JURPLIX**$41.12**4.4★**▲ 141%**](https://www.amazon.com/dp/B0G56B6YWP) [**Water Heater Pilot Assembly Fit for Rheem Ruud Richmond SP20754 SP21058 SP21059 SP20800 NG/LP Universal Burner Ignition Replacement Kit with Thermopile and Sparker**Quwfesudy**$39.95**5.0★**▲ 97%**](https://www.amazon.com/dp/B0FW9ZG335) [**SP21058 Replacement for Rheem Pilot Assembly Compatible with Select Rheem Ruud Water Heaters Replacement for Water Heater Parts Water Heater Burner Assembly with Thermopile and Thermocouple**VitaFlow Tool**$48.82**3.8★**▲ 65%**](https://www.amazon.com/dp/B0FY25BBYX) [**SP20824 Pilot Assembly for Water Heater Parts Compatible with Rheem Ruud**TT Tokuein**$38.66**3.8★**▲ 52%**](https://www.amazon.com/dp/B0F31ZX42P) [**SP21058 SP20824 Pilot Burner Assembly Replacement Kit**Sejaede**$41.33**4.4★**▲ 38%**](https://www.amazon.com/dp/B0FT7LZ19Q)
**~~View all trending →~~**
## **What buyers say about sp21058**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**24%
*“Fit perfect”*
**Efficiency**13%
*“Works great”*
**Assembly/Installation**13%
*“Easy to install”*
**Advertised Vs Actual Product**11%
*“worked as expected”*
**Value For Money**10%
*“Great value for your money perfect fit super fast shipping recommended will buy again thank you”*
**Quality-Overall**10%
*“good quality”*
**Ease Of Use**5%
*“Easy easy”*
**Correct Contents**4%
*“This replacement pilot assembly kit arrived with all the parts neatly organized and clearly labeled”*
**Compatibility-Overall**3%
*“which made it easier to verify compatibility before installation”*
**Maintenance And Repair**3%
*“this is an easy fix”*
### **What buyers complain about **
**Durability**23%
*“Failed after 2 weeks”*
**Defective Material/Parts**16%
*“The part tends to shut off does not work correctly”*
**Functionality-Overall**13%
*“Did not work”*
**Size-Overall**11%
*“The wires on the replacement thermopile were significantly shorter than the original”*
**Compatibility-Overall**7%
*“Not compatible”*
**Assembly/Installation**5%
*“I needed the entire pilot assembly”*
**Quality-Overall**5%
*“Garbage, died in 48 hours”*
**Leak-Proof**4%
*“caused gas leak”*
**Instructions/User Manual/Troubleshooting**2%
*“There are no instructions”*
**Rusts/Corrodes**2%
*“Accidentally broke a thermocouple due to age of the equipment it was too corroded”*
### **Top return reasons **
**Size-Overall**19%
**Defective Material/Parts**17%
**Compatibility-Overall**17%
**Assembly/Installation**14%
**Functionality-Overall**14%
**Advertised Vs Actual Product**9%
**Maintenance And Repair**3%
**Connectivity-Overall**2%
**Durability**1%
**Product Condition**1%
## **Common questions**
- **Is sp21058 profitable to sell on Amazon United States?**
- The niche generates $75K/yr across 13 tracked products. 3 of 7 products launched in the last 360 days are still selling. 90-day search growth is -0.2%. Flapen's verdict: Skip it (48/100).
- **How competitive is the sp21058 niche?**
- 13 brands and 15 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 73% of demand.
- **What do buyers complain about in sp21058?**
- Top complaints mined from reviews: Durability, Defective Material/Parts, Functionality-Overall. The return rate is 6.5% — above our launch gate.
- **When does demand for sp21058 peak?**
- Demand peaks in Jul; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the sp21058 niche?**
- Listings span $25.96–$68.08; the average listing price is $42.25 (sweet spot $15–$100). The average incumbent carries 59 reviews — the moat a new listing must climb.
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