Is leveluk k8 filter replacement profitable to sell on Amazon United States?

The niche generates $18K/yr across 6 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -53.4%. Flapen's verdict: Skip it (31/100).

How competitive is the leveluk k8 filter replacement niche?

6 brands and 14 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 86% of demand.

What do buyers complain about in leveluk k8 filter replacement?

Top complaints mined from reviews: Leak-Proof, Filtration, Value For Money. The return rate is 5.9% — above our launch gate.

When does demand for leveluk k8 filter replacement peak?

Demand peaks in Jan–Feb–Sep; the busiest month runs 2.7× the quietest.

What does it cost to enter the leveluk k8 filter replacement niche?

Listings span $58.46–$146.50; the average listing price is $105.31 (sweet spot $15–$100). The average incumbent carries 83 reviews — the moat a new listing must climb.

leveluk k8 filter replacement

Skip it

Soft demand (-53.4% this quarter) — this niche doesn't clear our bar today.

Review moat

Incredible82.83

avg incumbent reviews — the moat a new listing must climb

Avg price

Good$105.31

avg listing price — sweet spot $15–$100

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Conversion

Good5.0%

search→purchase rate — share of searches ending in a sale

Price range

Okay$58.46–$146.50

cheapest to priciest tracked listing — scored on the share inside $15–$100

Brand share

Okay86%

top-5 brand share — brands hold most of the demand

Returns

Bad5.9%

return rate — above 5% kills the launch gate

Competition

Bad86%

top-5 click share — a locked-up shelf

Market size

Bad$18K

$18K/yr · 3K searches

Growth

Bad-53.4%

90-day search growth — must beat 0% to launch

Signals No Dominant Brand Low Review Barrier High Returns High Price

According to Flapen's Amazon United States niche tracking, leveluk k8 filter replacement is a $18K/yr Amazon United States market (3K searches/yr). The top 5 brands hold 86% of demand. Demand peaks in Jan–Feb–Sep. Verdict: Skip it — 31/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

leveluk k8 filter replacement market data

Units sold / yr: 250–500; avg 0–100/product
Revenue / yr: $26K–$53K; units × avg price
Conversion rate: 5.0%
Avg BSR: #470
Page quality: 0%
Prime: 83%
Sponsored: 50%
Out of stock: 28.3%
Avg brand age: 18 months
Avg seller age: 190 days

Competition & brand share

The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.

Brands

6 falling

Sellers

Top-5 brand share

86%

Top 20: 100%

Top-5 click share

86%

Top 20: 100%

Open market

COOLVIVA19%
FAIR KANPAI19%
Enagic19%
Saillong16%
PERCOLA15%
Zomixzo14%

Demand & seasonality

Weekly Amazon search volume, last 82 weeks — -53.4% search growth over the last 90 days.

Peak months: Jan, Feb, Sep · busiest ÷ quietest = 2.7×

Open Trend

Top leveluk k8 filter replacement 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 6 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Water Filter Replacement Kit by COOLVIVA. FC1 Replaces Enagic Leveluk F8 and HG-N Filters on K8 SD501 JRIV Machine. Features One FC1 Water Filter Two Cleaning Powders and a Reminder

COOLVIVA$135.914.3★54 rev

F8 filter K-8 water purifier machine with 2 packs of cleaning powder by FAIR KANPAI

FAIR KANPAI$140.844.4★22 rev

Enagic Kangen Water Filter - Genuine Enagic F8

Enagic$146.504.3★321 rev

Saillong 1 Pack F8 Filter Replacement Cartridge Compatible with HG-N Type Water Ionizer Compatible with Enagic Kangen LeveLuk SD501 JrIV K8 (Not Original Type Before 2010)

Saillong$74.434.0★18 rev

PERCOLA FC1 F8 HG-N Water Filter 1-Pack

PERCOLA$75.714.0★75 rev

Newest

by launch date

HG-N FC1 F8 Water Filter Replacement Compatible with Enagic Leveluk F8 and HG-N Filters for K8 and SD501 (2011+) JRIV Machine Machines 1 Pack

Zomixzo$58.467 rev

3mo ago

Saillong 1 Pack F8 Filter Replacement Cartridge Compatible with HG-N Type Water Ionizer Compatible with Enagic Kangen LeveLuk SD501 JrIV K8 (Not Original Type Before 2010)

Saillong$74.4318 rev

7mo ago

PERCOLA FC1 F8 HG-N Water Filter 1-Pack

PERCOLA$75.7175 rev

1y ago

F8 filter K-8 water purifier machine with 2 packs of cleaning powder by FAIR KANPAI

FAIR KANPAI$140.8422 rev

1y ago

Water Filter Replacement Kit by COOLVIVA. FC1 Replaces Enagic Leveluk F8 and HG-N Filters on K8 SD501 JRIV Machine. Features One FC1 Water Filter Two Cleaning Powders and a Reminder

COOLVIVA$135.9154 rev

2y ago

What buyers say about leveluk k8 filter replacement

What buyers praise and complain about, mined from review topics.

What buyers love

Filtration22%

“Great Filter”

Size-Overall15%

“Fits perfectly”

Quality-Overall11%

“The quality is just as good”

Value For Money10%

“worth it”

Assembly/Installation8%

“easy to install”

Compatibility-Overall6%

“very compatible to my kangen ionizer”

Leak-Proof5%

“It fits perfectly no leakage just as easy to install as the magic brand I would give it a five for everything including value for the money”

Efficiency4%

“Works well”

Ease Of Cleaning3%

“Well after all the cleaning”

Advertised Vs Actual Product3%

“As described”

What buyers complain about

Leak-Proof26%

“Bad leaking”

Filtration20%

“Cheap, low quality filter”

Value For Money15%

“The amount of savings is not worth it”

Compatibility-Overall8%

“not compatible with Kangen K8”

Size-Overall8%

“there is a problem withe the fit”

Quality-Overall5%

“Cheap, low quality filter”

Certifications4%

“What concerns me is that this one does not have the certification by WQA for the reduction of chlorine”

Durability2%

“After only one week of use, I noticed that the bottom of my kettle became cloudy, and even my water pitcher became dull and cloudy as well”

Top return reasons

Compatibility-Overall24%

Filtration23%

Size-Overall17%

Leak-Proof14%

Advertised Vs Actual Product7%

Connectivity-Overall3%

Value For Money2%

Functionality-Overall2%

Quality-Overall2%

Defective Material/Parts1%

Common questions

Is leveluk k8 filter replacement profitable to sell on Amazon United States?: The niche generates $18K/yr across 6 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -53.4%. Flapen's verdict: Skip it (31/100).
How competitive is the leveluk k8 filter replacement niche?: 6 brands and 14 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 86% of demand.
What do buyers complain about in leveluk k8 filter replacement?: Top complaints mined from reviews: Leak-Proof, Filtration, Value For Money. The return rate is 5.9% — above our launch gate.
When does demand for leveluk k8 filter replacement peak?: Demand peaks in Jan–Feb–Sep; the busiest month runs 2.7× the quietest.
What does it cost to enter the leveluk k8 filter replacement niche?: Listings span $58.46–$146.50; the average listing price is $105.31 (sweet spot $15–$100). The average incumbent carries 83 reviews — the moat a new listing must climb.