Is water filter cartridge profitable to sell on Amazon United States?

The niche generates $245K/yr across 14 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -10.0%. Flapen's verdict: Skip it (46/100).

How competitive is the water filter cartridge niche?

10 brands and 39 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 85% of demand.

What do buyers complain about in water filter cartridge?

Top complaints mined from reviews: Filtration, Size-Overall, Quality-Overall. The return rate is 0.9%.

When does demand for water filter cartridge peak?

Demand peaks in Aug; the busiest month runs 1.5× the quietest.

What does it cost to enter the water filter cartridge niche?

Listings span $10.09–$34.84; the average listing price is $20.92 (sweet spot $15–$100). The average incumbent carries 10,584 reviews — the moat a new listing must climb.

water filter cartridge

Skip it

Soft demand (-10.0% this quarter) — this niche doesn't clear our bar today.

Returns

Incredible0.9%

return rate — above 5% kills the launch gate

Avg price

Great$20.92

avg listing price — sweet spot $15–$100

Price range

Great$10.09–$34.84

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

Conversion

Good7.0%

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

Market size

Okay$245K

$245K/yr · 169K searches

Brand share

Okay85%

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

Competition

Bad71%

top-5 click share — a locked-up shelf

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad10,584.21

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-10.0%

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

According to Flapen's Amazon United States niche tracking, water filter cartridge is a $245K/yr Amazon United States market (169K searches/yr). The top 5 brands hold 85% of demand. Demand peaks in Aug. Verdict: Skip it — 46/100.

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

water filter cartridge market data

Units sold / yr: 10K–13K; avg 750–1,000/product
Revenue / yr: $209K–$262K; units × avg price
Conversion rate: 7.0%
Avg BSR: #87
Page quality: 0%
Prime: 100%
Sponsored: 86%
Out of stock: 7.7%
Avg brand age: 78 months
Avg seller age: 147 days

Competition & brand share

The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.

Brands

10 rising

Sellers

Top-5 brand share

85%

Top 20: 100%

Top-5 click share

71%

Top 20: 100%

Open market

10%

Amazon Basics57%
Aquaboon9%
PUREPLUS7%
ICEPURE7%
Membrane Solutions6%
Culligan5%
Open — no brand owns it (4 brands, 10%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -10.0% search growth over the last 90 days.

Peak months: Aug · busiest ÷ quietest = 1.5×

Open Trend

Top water filter cartridge search terms

water filter cartridge42K/yr +6.1%3.8% conv.
water filters cartridges22K/yr -10.1%2.2% conv.
water filter cartridge replacement19K/yr -5.9%4.1% conv.
amazon basics water filter13K/yr -0.7%12.1% conv.
replacement under-sink water filters13K/yr -10.8%0.2% conv.
water filter cartridges12K/yr -9.1%4.2% conv.
cartuchos para filtros de agua8K/yr -8.7%0.5% conv.
amazon basics water filter pitcher9K/yr -38.2%9.3% conv.
replacement water filter cartridges7K/yr -28.7%1.0% conv.
cartucho de filtro de agua6K/yr -28.0%0.4% conv.

All search terms

Top water filter cartridge 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 14 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Amazon Basics Enhanced Water Filters for Pitcher Brita Compatible 3-Pack

Amazon Basics$11.154.6★34,546 rev

Amazon Basics 10-Cup Pitcher with Filter Compatible with Brita Water Filter

Amazon Basics$23.674.4★8,042 rev

Amazon Basics Enhanced Water Filters for Pitcher Brita Compatible 6-Pack

Amazon Basics$17.824.6★34,546 rev

Aquaboon 5 Micron 10 x 2.5 Sediment Filter - Whole House Water Filter Replacement Compatible with Well Water Filters - P5 AP110 WHKF-GD05 6 Pack

Aquaboon$23.324.7★5,541 rev

ICEPURE 1 Micron 2.5 x 10 Whole House CTO Carbon Sediment Water Filter Cartridge Compatible with DuPont WFPFC8002 WFPFC9001 SCWH-5 WHCF-WHWC WHCF-WHWC FXWTC CBC-10 RO Unit Pack of 4

ICEPURE$26.774.6★6,299 rev

Newest

by launch date

AquaWeaver 5 Micron Sediment Water Filter Cartridge 10 x 2.5 Whole House Filter Replacement Compatible with All Standard 10-Inch RO and Well Water Filter Systems HF-150A WH-S200-C AP11T 6 Pack

AquaWeaver$21.5690 rev

8mo ago

Amazon Basics Under Sink Water Filter System NSF/ANSI 42 & 372 Certified Easy Twist-and-Lock Design 11 000 Gallons 1 Year Service Life White

Amazon Basics$34.84180 rev

11mo ago

Amazon Basics Enhanced Water Filters for Pitcher Brita Compatible 3-Pack

Amazon Basics$11.1534,546 rev

5y ago

Amazon Basics 10-Cup Pitcher with Filter Compatible with Brita Water Filter

Amazon Basics$23.678,042 rev

6y ago

Amazon Basics Enhanced Water Filters for Pitcher Brita Compatible 6-Pack

Amazon Basics$17.8234,546 rev

6y ago

What buyers say about water filter cartridge

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

What buyers love

Filtration29%

“Excellent Filter”

Value For Money17%

“Decent price”

Size-Overall14%

“Fits like a glove”

Quality-Overall10%

“Build quality looks solid”

Advertised Vs Actual Product9%

“As described”

Ease Of Use3%

“Easy to use”

Efficiency3%

“They still do the same job”

Assembly/Installation2%

“Easy to assemble and use”

Compatibility-Overall2%

“Work great for my water filter system”

Water Resistance1%

“Keeps water clean and clear”

What buyers complain about

Filtration31%

“Poor quality water filter”

Size-Overall10%

“Do not fit”

Quality-Overall7%

“Cheaply made”

Durability5%

“Broke inside of six months”

Leak-Proof5%

“Leaks like crazy”

Value For Money4%

“cheaper”

Ease Of Use3%

“which means it's hard to take off”

Water Resistance3%

“Water Filtes”

Jamming/Clogging2%

“The water gets clogged”

Smell2%

“It makes the water smell and taste funny”

Top return reasons

Size-Overall47%

Filtration24%

Compatibility-Overall11%

Value For Money3%

Advertised Vs Actual Product3%

Leak-Proof2%

Functionality-Overall2%

Quality-Overall1%