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1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet

1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet shows a sweet-spot price point ($21.45 avg), but soft demand (-18.1% this quarter) keeps it on the watch list.

Signals No Dominant Brand

Flapen Score

55
Worth a look

Top 21% of 9,536 Tools & Home Improvement niches · +7 vs the category median of 48

Market size 20Growth 16Conversion 78Competition 83Returns 56Price range 85Avg price 91Brand share 85Review moat 73Quality gap 24
This niche Category average · 9,536 niches

Is 1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet profitable on Amazon?

According to Flapen's Amazon United States niche tracking, 1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet is a $81K/yr Amazon United States market (48K searches/yr). The top 5 brands hold 50% of demand. Verdict: Worth a look — 55/100.

1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved -18.1% over the last 90 days and 7.8% of searches end in a purchase.

$81K

revenue / yr

Units sold / yr4K
Search volume / yr-18.1%48K
Conversion rate7.8%
Avg price$21.45

Who owns the niche?

The top 5 brands hold 50% of demand, so 50% of the market is open.

50%

open market share

Brands · sellers32 · 114
Top-5 product click share32%
Open market50%
Avg brand age49 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.6★ — the gap to enter on.

0/100

page quality · 62 products

Sponsored placement81%
New entrants (1y)9· 3 succeeded
Avg rating4.6★
Avg reviews593

Top 1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Top sellers

by 90-day click share
Eastman Multi-Turn Angle Stop Valve with Nut and Sleeve 3/8 Inch OD x 5/8 Inch OD Chrome Plate 48290LF

Eastman Multi-Turn Angle Stop Valve with Nut and Sleeve 3/8 Inch OD x 5/8 Inch OD Chrome Plate 48290LF

Price
$7.34
Rating
4.7/5
Reviews
426
Age
12y ago
10 Pack GUOFIS Angle Compression Stop Valve 1/4 Turn Water Shut Off Valve

10 Pack GUOFIS Angle Compression Stop Valve 1/4 Turn Water Shut Off Valve

Price
$38.19
Rating
4.8/5
Reviews
276
Age
3y ago
[10-Pack] PROCURU Heavy Duty Angle Stop Valve 1/2 Nominal (5/8 OD) Compression x 3/8 OD 1/4-Turn Operation (PCAS12-10P)

[10-Pack] PROCURU Heavy Duty Angle Stop Valve 1/2 Nominal (5/8 OD) Compression x 3/8 OD 1/4-Turn Operation (PCAS12-10P)

Price
$44.51
Rating
4.6/5
Reviews
315
Age
8y ago
10PCS EFIELD Angle Stop Valve 1/2 Nominal (5/8 OD) Compression x 3/8 OD

10PCS EFIELD Angle Stop Valve 1/2 Nominal (5/8 OD) Compression x 3/8 OD

Price
$38.49
Rating
4.8/5
Reviews
460
Age
6y ago
Toilet Connector Water Line Kit with 12 Length Long 3/8 COMP x 7/8 BC Toilet Connector Hose 1/2 inch NOM Inlet x 3/8 inch OD Compression Outlet Angle Shut Off and Escutcheon Plate

Toilet Connector Water Line Kit with 12 Length Long 3/8 COMP x 7/8 BC Toilet Connector Hose 1/2 inch NOM Inlet x 3/8 inch OD Compression Outlet Angle Shut Off and Escutcheon Plate

Price
$13.93
Rating
4.6/5
Reviews
325
Age
5y ago

Trending

90-day click momentum
2 Pack 1/2 Mini Ball Valve 304 Stainless Steel Valve NPT Female x Male Thread Shut-Off Valves for Small Compact Space (2 1/2 Inch)

2 Pack 1/2 Mini Ball Valve 304 Stainless Steel Valve NPT Female x Male Thread Shut-Off Valves for Small Compact Space (2 1/2 Inch)

Price
$14.63
Rating
4.5/5
Reviews
119
Age
11mo ago
PevePexe Toilet Hose Water Supply Line Kit - 15 Length 3/8 COMP x 7/8 BC Braided Toilet Connector Hose & Shut Off Toilet Water 1/2 inch NOM Inlet x 3/8 inch OD Compression Outlet Angle

PevePexe Toilet Hose Water Supply Line Kit - 15 Length 3/8 COMP x 7/8 BC Braided Toilet Connector Hose & Shut Off Toilet Water 1/2 inch NOM Inlet x 3/8 inch OD Compression Outlet Angle

Price
$15.94
Rating
5.0/5
Reviews
8
Age
6mo ago
1 Pack Angle Stop Valve 1/4 Turn Water Shut Off Valves 1/2 Nominal (5/8 OD) Compression Inlet x 3/8 OD Compression Outlet Shut-off Valve for Sink Bathroom Toilet Kitchen Laundry Plumbing

1 Pack Angle Stop Valve 1/4 Turn Water Shut Off Valves 1/2 Nominal (5/8 OD) Compression Inlet x 3/8 OD Compression Outlet Shut-off Valve for Sink Bathroom Toilet Kitchen Laundry Plumbing

Price
$8.18
Rating
4.3/5
Reviews
31
Age
8mo ago
Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control 1-Pack Multicolor

Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control 1-Pack Multicolor

Price
$14.89
Rating
4.6/5
Reviews
16,896
Age
7y ago
10PC HeSun 1/2 PEX-B Crimp x 3/8 OD Compression Angle Stop Valve

10PC HeSun 1/2 PEX-B Crimp x 3/8 OD Compression Angle Stop Valve

Price
$29.86
Rating
4.8/5
Reviews
356
Age
2y ago

Newest

by launch date
PevePexe Toilet Hose Water Supply Line Kit - 15 Length 3/8 COMP x 7/8 BC Braided Toilet Connector Hose & Shut Off Toilet Water 1/2 inch NOM Inlet x 3/8 inch OD Compression Outlet Angle

PevePexe Toilet Hose Water Supply Line Kit - 15 Length 3/8 COMP x 7/8 BC Braided Toilet Connector Hose & Shut Off Toilet Water 1/2 inch NOM Inlet x 3/8 inch OD Compression Outlet Angle

Price
$15.94
Rating
5.0/5
Reviews
8
Age
6mo ago
1 Pack Angle Stop Valve 1/4 Turn Water Shut Off Valves 1/2 Nominal (5/8 OD) Compression Inlet x 3/8 OD Compression Outlet Shut-off Valve for Sink Bathroom Toilet Kitchen Laundry Plumbing

1 Pack Angle Stop Valve 1/4 Turn Water Shut Off Valves 1/2 Nominal (5/8 OD) Compression Inlet x 3/8 OD Compression Outlet Shut-off Valve for Sink Bathroom Toilet Kitchen Laundry Plumbing

Price
$8.18
Rating
4.3/5
Reviews
31
Age
8mo ago
2 Pack 1/2 Mini Ball Valve 304 Stainless Steel Valve NPT Female x Male Thread Shut-Off Valves for Small Compact Space (2 1/2 Inch)

2 Pack 1/2 Mini Ball Valve 304 Stainless Steel Valve NPT Female x Male Thread Shut-Off Valves for Small Compact Space (2 1/2 Inch)

Price
$14.63
Rating
4.5/5
Reviews
119
Age
11mo ago
2 Pack Toilet Valve Replacement Kit with Water Supply Line Shut Off Valve

2 Pack Toilet Valve Replacement Kit with Water Supply Line Shut Off Valve

Price
$21.20
Rating
4.3/5
Reviews
112
Age
1y ago
1 Pack Toilet Valve Replacement Kit with Water Supply Line Shut Off Valve

1 Pack Toilet Valve Replacement Kit with Water Supply Line Shut Off Valve

Price
$14.39
Rating
4.3/5
Reviews
112
Age
1y ago

Competition: brands, sellers & click share

Clicks spread well past the top 5 (32% combined) — an open shelf where new products get seen.

$0$2K$5K$7K$10K1101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

32 flat

Sellers

114

Top-5 brand share

50%

Top 20: 91%

Top-5 click share

32%

Top 20: 67%

Open market

44%

  • GUOFIS13%
  • Eastman12%
  • EFIELD10%
  • PXZBLG9%
  • TT FLEX6%
  • PROCURU6%

1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume48KCVR7.8%Products62Brands32Top 5 Brands50%OOS Rate1.7%Rating4.6★Reviews593Avg BSR#595
1K600Spike '25Holiday '25Spike '26Aug '25Oct '25Dec '25Feb '26Apr '26Jun '26

Top 1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • angle stops5K/yr
  • toilet water shut off valve5K/yr
  • 1/2 x 3/8 compression shut off valve 1/4 turn3K/yr
  • 1/2 valve shut off4K/yr
  • toilet shutoff valve5K/yr
  • 1/2 inch shut off valve4K/yr
  • toilet supply valve4K/yr
  • 1/2 shut off valve water line3K/yr
  • 1/2 angle stop valve3K/yr
  • 1/4 turn angle valve 1/2 inlet 3/8 outlet5K/yr

What reviews say buyers love and hate about 1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet

What buyers mention most, as a share of all reviews.

What buyers love

82% of reviews
Assembly/Installation23%

“Easy fix”

Quality-Overall15%

“Quality is fair”

Value For Money9%

“Great Value”

Advertised Vs Actual Product7%

“As advertised”

Efficiency6%

“Perfect Solution”

What buyers complain about

66% of reviews
Leak-Proof23%

“They leak”

Quality-Overall12%

“Garbage”

Noise Level10%

“Random noises”

Durability7%

“broke almost instantly”

Functionality-Overall3%

“Has never worked properly”

1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet return rate & reasons

Why buyers send it back, as a share of all return requests.

2.8%

Return rate

54%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1Size-Overall
43%
2Leak-Proof
11%
3Defective Material/Parts
7%
4Compatibility-Overall
7%
5Advertised Vs Actual Product
6%

Common 1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores 1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet 55/100 on Amazon United States — Worth a look. The niche generates $81K/yr across 62 tracked products. 3 of 9 products launched in the last 360 days are still selling. Search demand moved -18.1% over the last 90 days.
1/4 Turn Angle Valve 1/2 Inlet 3/8 Outlet buyers on Amazon United States complain most about Leak-Proof, Quality-Overall, Noise Level, the themes mined from the niche's reviews. Its return rate is 2.8%.