Check Valve
FailShoppers spend an estimated $76K a year here, so Check Valve is a Fail.
- Flapen Score
- 38 / 100Ranks 3,520 of 3,978 Pet Supplies niches · −13 vs the category median of 5138
- Market size
- $76K/yr211K searches / yr
- 90-day growth
- +6.3%search demand this quarter
- Competition
- 66%top-5 click share · 11 brands · 23 sellers
Flapen Score
Check Valve against its category
The dotted line is the Pet Supplies average. Past it, Check Valve is stronger. Inside it, weaker.
Market
The Check Valve market on Amazon at a glance
Shoppers on Amazon United States searched for Check Valve 211K times last year and spent an estimated $76K. The top 5 brands take 77% of clicks. Flapen scores it 38 out of 100, a Fail.
01 · Demand
An estimated 3.7% of those searches ended in a purchase.
Shoppers searched for this 211K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 3.7% of those searches ended in a purchase. Searches in the last 90 days moved +6.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated $76K a year.
- Searches, last 12 months
- 211K
- Growth, 90 days vs prior 90
- +6.3%
- Conversion, latest week
- 3.7%
- Market size, estimated
- $76Ka year
- Peak month
- November1.4× the quietest month
- Top search term
- check valve75K searches a year
02 · Price
A sale here is worth $9.76.
Listings sell for $9.76 on average, from $4.15 to $20.77. Amazon reports units sold in ranges. This niche sold 8K to 10K a year. The average listing sells 500 to 750 of them. At $9.76 that is $5K to $7K a year per listing.
- Average price
- $9.76under the $15 to $100 sweet spot
- Price range
- $4.15–$20.77
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 8K–10K
- Units per listing a year
- 500–750
- Revenue per listing a year
- $5K–$7K
- Returns
- 2.4%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
93% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #45 within Fish & Aquatic Pets. It carries 2,092 reviews at 4.47 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 93%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #45in Fish & Aquatic Pets
- Average rating
- 4.47 starsAmazon United States average 4.42 stars
- Average reviews
- 2,092per listing
- Listings tracked
- 14
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 52 months on average, so the names here are settling in.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 52 months
Products
Top Check Valve products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 17, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Pawfly 6 PCS Aquarium Check Valves for Common Air Pumps Red Plastic 1-Way Non-Return Valves Pump Protectors for Standard 3/16 Inch Airline Tubing Fish Tank Accessories for Aeration Setup
- Price
- $5.02
- Rating
- 4.5/5
- Reviews
- 5,502
- Age
- 9y ago

6 Pieces One Way Inline Check Valve Bulk 3/8 Inch 10 mm ABS Plug-in Non Return Check Valve Fuel Water Gas Air Ozone Pipe One-way for Liquids and Gas
- Price
- $9.00
- Rating
- 4.5/5
- Reviews
- 369
- Age
- 5y ago

PumpSpy Silent Check Valve - 1-1/2 with Buna-N Couplings Model CV-150 Spring-Loaded Flapper Sump Pump Life Expectancy Increase Includes Steel Clamps Fit 1-1/2 Pipe
- Price
- $20.77
- Rating
- 4.7/5
- Reviews
- 2,001
- Age
- 5y ago

AQUANEAT Aquarium Check Valve One Way Non Return Valve for Air Pump Fit for 3/16 Inch Airline Tubing Fish Tank Accessories 10pcs (Red)
- Price
- $4.67
- Rating
- 4.4/5
- Reviews
- 905
- Age
- 6y ago

Uenede Solid Brass 3/4 Inch In-line Spring Check Valve 3/4 NPT Female Thread One-Way Non-return Prevent Water Back-flow
- Price
- $11.03
- Rating
- 4.5/5
- Reviews
- 135
- Age
- 3y ago
Trending
estimated 90-day click momentum
ChillWaves 304 Stainless Steel In-Line Siamese Check Valve 1/4 NPT Male x 1/4 NPT Female Thread One-Way Non-return Check Valve for Backflow Prevention(1-PACK)
- Price
- $14.84
- Rating
- 4.2/5
- Reviews
- 128
- Age
- 1y ago

Uenede Solid Brass 3/4 Inch In-line Spring Check Valve 3/4 NPT Female Thread One-Way Non-return Prevent Water Back-flow
- Price
- $11.03
- Rating
- 4.5/5
- Reviews
- 135
- Age
- 3y ago

Merrill MFG CVNL100 1 No-Lead Brass Check Valve 700 Series 1
- Price
- $19.86
- Rating
- 4.7/5
- Reviews
- 451
- Age
- 5y ago

Pawfly Aquarium Check Valves for Common Air Pumps Black Plastic 1-Way Non-Return Valves Pump Protectors for Standard 3/16 Inch Airline Tubing Fish Tank Accessories for Aeration Setup 6 Pack
- Price
- $5.00
- Rating
- 4.5/5
- Reviews
- 5,502
- Age
- 2y ago

Homewerks VCKP40E5B PVC Schedule 40 1-Inch in-Line Check Valve x Solvent 1 Inch White
- Price
- $10.51
- Rating
- 4.4/5
- Reviews
- 480
- Age
- 15y ago
Newest
by launch date
ChillWaves 304 Stainless Steel In-Line Siamese Check Valve 1/4 NPT Male x 1/4 NPT Female Thread One-Way Non-return Check Valve for Backflow Prevention(1-PACK)
- Price
- $14.84
- Rating
- 4.2/5
- Reviews
- 128
- Age
- 1y ago

DaToo Aquarium Air Pump Check Valve 12PCS Fish Tank One Way Non-Return Check Valve Air Pump Accessories for 3/16 Inch Airline Tubing
- Price
- $4.15
- Rating
- 4.5/5
- Reviews
- 170
- Age
- 2y ago

Pawfly Aquarium Check Valves for Common Air Pumps Black Plastic 1-Way Non-Return Valves Pump Protectors for Standard 3/16 Inch Airline Tubing Fish Tank Accessories for Aeration Setup 6 Pack
- Price
- $5.00
- Rating
- 4.5/5
- Reviews
- 5,502
- Age
- 2y ago

Uenede Solid Brass 3/4 Inch In-line Spring Check Valve 3/4 NPT Female Thread One-Way Non-return Prevent Water Back-flow
- Price
- $11.03
- Rating
- 4.5/5
- Reviews
- 135
- Age
- 3y ago

Litoexpe 1/2 One Way Inline Check Valve Non Return Ozone Resistance PVDF Plastic One-Way Fuel Oil Water Gas Pump Air Check Valve Pack of 2
- Price
- $6.75
- Rating
- 4.1/5
- Reviews
- 258
- Age
- 3y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 66% of clicks. Leaders hold, but buyers still shop past them.
Brands
11 falling
Sellers
23
Est. top-5 brand share
77%
Top 20: 100%
Est. top-5 click share
66%
Top 20: 100%
Open market
17%
- Pawfly50%
- Blulu7%
- PumpSpy7%
- AQUANEAT7%
- Uenede6%
- DaToo6%
- Open — no brand owns it (5 brands, 17%)
Demand
Check Valve search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.4×
Search terms
Top Check Valve search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- check valve75K/yr
- check valves35K/yr
- one way valve16K/yr
- aquarium check valve15K/yr
- check valve aquarium15K/yr
- air check valve10K/yr
- one way air valve10K/yr
- one way check valve9K/yr
- water check valve6K/yr
- pvc check valve7K/yr
Reviews and returns
What reviews say buyers love and hate about Check Valve
We read the reviews and the return reasons for every product selling here.
“through process of elimination i discovered it was the check valve leaking gas”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
19 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Check Valve questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









