sp21058
Skip itA small market ($75K/yr) — this niche doesn't clear our bar today.
Review moat
Incredible59.31avg incumbent reviews — the moat a new listing must climb
Avg price
Incredible$42.25avg listing price — sweet spot $15–$100
Price range
Incredible$25.96–$68.08cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great9.3%search→purchase rate — share of searches ending in a sale
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Brand share
Good73%top-5 brand share — brands hold most of the demand
Growth
Bad-0.2%90-day search growth — must beat 0% to launch
Competition
Bad73%top-5 click share — a locked-up shelf
Returns
Bad6.5%return rate — above 5% kills the launch gate
Market size
Bad$75K$75K/yr · 19K searches
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
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.Peak months: Jul · busiest ÷ quietest = 1.9×
Top sp21058 search terms
- rheem pilot assembly kit6K/yr
- sp210586K/yr
- rheem pilot assembly4K/yr
- rheem water heater pilot assembly3K/yr
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.
All 13 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
SP21058 SP20824 Pilot Assembly for Water Heater Parts with Thermopile & Sparker
JURPLIX$41.124.4★41 rev
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$26.064.2★221 rev
SP20824 Pilot Assembly for Water Heater Parts Compatible with Rheem Ruud
TT Tokuein$38.663.8★8 rev
Hoeine SP21058 Pilot Assembly Kit with Thermopile for Rheem Water Heater
Hoeine$44.314.0★40 rev
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$61.443.0★13 rev
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$48.825 rev
SP21058 SP20824 Pilot Assembly for Water Heater Parts with Thermopile & Sparker
JURPLIX$41.1241 rev
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$61.4413 rev
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$39.957 rev
SP21058 SP20824 Pilot Burner Assembly Replacement Kit
Sejaede$41.337 rev
Trending
90-day click momentumSP21058 SP20824 Pilot Assembly for Water Heater Parts with Thermopile & Sparker
JURPLIX$41.124.4★
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$39.955.0★
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$48.823.8★
SP20824 Pilot Assembly for Water Heater Parts Compatible with Rheem Ruud
TT Tokuein$38.663.8★
SP21058 SP20824 Pilot Burner Assembly Replacement Kit
Sejaede$41.334.4★
What buyers say about sp21058
What buyers praise and complain about, mined from review topics.What buyers love
“Fit perfect”
“Works great”
“Easy to install”
“worked as expected”
“Great value for your money perfect fit super fast shipping recommended will buy again thank you”
“good quality”
“Easy easy”
“This replacement pilot assembly kit arrived with all the parts neatly organized and clearly labeled”
“which made it easier to verify compatibility before installation”
“this is an easy fix”
What buyers complain about
“Failed after 2 weeks”
“The part tends to shut off does not work correctly”
“Did not work”
“The wires on the replacement thermopile were significantly shorter than the original”
“Not compatible”
“I needed the entire pilot assembly”
“Garbage, died in 48 hours”
“caused gas leak”
“There are no instructions”
“Accidentally broke a thermocouple due to age of the equipment it was too corroded”
Top return reasons
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.