Is water filter for sink profitable to sell on Amazon United States?

The niche generates $2.6M/yr across 23 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +11.3%. Flapen's verdict: Worth a look (55/100).

How competitive is the water filter for sink niche?

12 brands and 84 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 88% of demand.

What do buyers complain about in water filter for sink?

Top complaints mined from reviews: Filtration, Leak-Proof, Durability. The return rate is 4.4%.

When does demand for water filter for sink peak?

Demand peaks in Aug; the busiest month runs 1.7× the quietest.

What does it cost to enter the water filter for sink niche?

Listings span $6.43–$95.30; the average listing price is $35.70 (sweet spot $15–$100). The average incumbent carries 8,921 reviews — the moat a new listing must climb.

water filter for sink

Worth a look

Shows a $2.6M/yr market, but a deep review moat (8,921 avg reviews) keeps it on the watch list.

Market size

Incredible$2.6M

$2.6M/yr · 2.1M searches

Avg price

Incredible$35.70

avg listing price — sweet spot $15–$100

Price range

Great$6.43–$95.30

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

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Competition

Okay57%

top-5 click share — leaders hold, buyers still browse

Conversion

Okay3.5%

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

Growth

Okay+11.3%

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

Returns

Okay4.4%

return rate — above 5% kills the launch gate

Brand share

Okay88%

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

Review moat

Bad8,920.83

avg incumbent reviews — the moat a new listing must climb

According to Flapen's Amazon United States niche tracking, water filter for sink is a $2.6M/yr Amazon United States market (2.1M searches/yr). The top 5 brands hold 88% of demand. Demand peaks in Aug. Verdict: Worth a look — 55/100.

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

water filter for sink market data

Units sold / yr: 60K–80K; avg 3,000–4,000/product
Revenue / yr: $2.1M–$2.9M; units × avg price
Conversion rate: 3.5%
Avg BSR: #40
Page quality: 0%
Prime: 100%
Sponsored: 91%
Out of stock: 0.0%
Avg brand age: 43 months
Avg seller age: 141 days

Competition & brand share

The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 falling

Sellers

Top-5 brand share

88%

Top 20: 100%

Top-5 click share

57%

Top 20: 97%

Open market

PUR34%
BRITA23%
Waterdrop18%
CECEFIN9%
Filterbaby4%
ATOJET3%
Open — no brand owns it (6 brands, 9%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +11.3% search growth over the last 90 days.

Peak months: Aug · busiest ÷ quietest = 1.7×

Open Trend

Top water filter for sink search terms

sink water filter294K/yr +5.2%1.9% conv.
sink filter252K/yr +22.9%1.7% conv.
faucet filter211K/yr +22.1%1.9% conv.
faucet water filter207K/yr +8.2%2.5% conv.
bathroom sink filter121K/yr -12.7%1.5% conv.
pur water filter faucet94K/yr +9.8%6.6% conv.
water filter faucet97K/yr +2.5%1.7% conv.
sink filter water faucet90K/yr -5.0%1.7% conv.
brita faucet filter87K/yr +12.5%5.1% conv.
water faucet filter75K/yr +17.1%2.3% conv.

All search terms

Top water filter for sink 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 23 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

PUR Plus Vertical Faucet-Mount Water Filtration System Lead-Reducing Filter Easy Installation 100-Gallon Capacity Compatible with External Aerators Grey

PUR$21.654.4★23,350 rev

Brita Faucet Mount Water Filter System White No-Wait Filtration Easy Install Multi-Use Tap Water Filter for Kitchens Bathrooms & Small Spaces

BRITA$29.374.3★19,110 rev

PUR Plus Vertical Faucet Mount Water Filtration System Lead-Reducing Filter Great-Tasting Easy Install Lasts 100 Gallons Faucet Water Filter Compatible with Sinks with External Aerators Chrome

PUR$29.254.4★10,920 rev

Brita Faucet Mount Water Filter System Chrome No-Wait Filtration Easy Install Multi-Use Tap Water Filter for Kitchens Bathrooms & Small Spaces

BRITA$30.893.8★3,046 rev

CECEFIN Sink Filter for Bathroom/Kitchen Water Faucet Extender 1080 Swivel

CECEFIN$25.874.3★1,352 rev

Newest

by launch date

PUR Plus Vertical Faucet-Mount Water Filtration System Lead-Reducing Filter Easy Installation 100-Gallon Capacity Compatible with External Aerators Grey

PUR$21.6523,350 rev

9mo ago

Atojet Cleansing Washbasin Faucet Filter Inspired By Koreas Beauty Culture - Pure Carbon Filters for Bathroom (1 Year Supply) (AJ8310C-SET-1YR)

ATOJET$38.18106 rev

1y ago

Filterbaby Skincare Filter 2.0 Bathroom Sink Filter Faucet for Skin Care

Filterbaby$95.30508 rev

1y ago

Filterbaby Skincare Filter 2.0 Bathroom Sink Filter Faucet for Skin Care

Filterbaby$84.54178 rev

2y ago

Frizzlife Water Filter for Sink Faucet Extender NSF/ANSI 372 9pcs Filter Reduce 99% Chlorine 1080 Rotating Brass Swivel Aerator 2 Modes Spray Faucet Filter for Skin Kitchen Bathroom Sink FF1080

FRIZZLIFE$25.17875 rev

2y ago

What buyers say about water filter for sink

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

What buyers love

Filtration20%

“Filter works well”

Assembly/Installation19%

“Easy to assemble”

Quality-Overall10%

“Good Quality and Great Customer Service”

Value For Money9%

“much less expensive”

Ease Of Use4%

“it is very easy to open”

Size-Overall4%

“EXACT FIT”

Advertised Vs Actual Product3%

“As Advertised”

Efficiency3%

“Works well for my faucet”

Leak-Proof2%

“Does NOT leak”

Durability2%

“Very durable”

What buyers complain about

Filtration20%

“the filter was not right”

Leak-Proof12%

“It leaks”

Durability8%

“Broke Within a Week”

Size-Overall8%

“Smaller”

Quality-Overall6%

“So low quality”

Spray/Flow4%

“Poor flow”

Functionality-Overall3%

“Didn't work for me”

Assembly/Installation3%

“Hard to install”

Value For Money2%

“More cost,”

Water Resistance2%

“was squirting water everywhere”

Top return reasons

Size-Overall44%

Compatibility-Overall21%

Filtration11%

Advertised Vs Actual Product4%

Leak-Proof4%