Is toilet flush system profitable to sell on Amazon United Kingdom?

The niche generates £208K/yr across 27 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is +0.8%. Flapen's verdict: Worth a look (52/100).

How competitive is the toilet flush system niche?

22 brands and 46 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 55% of demand.

What do buyers complain about in toilet flush system?

Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 3.1%.

When does demand for toilet flush system peak?

Demand is steady year-round — the busiest month runs 1.3× the quietest.

What does it cost to enter the toilet flush system niche?

Listings span £3.46–£23.67; the average listing price is £13.08 (sweet spot $15–$100). The average incumbent carries 580 reviews — the moat a new listing must climb.

toilet flush system

Worth a look

Shows no brand lock-in (top 5 brands take 55% of clicks), but soft demand (+0.8% this quarter) keeps it on the watch list.

Brand share

Great55%

top-5 brand share — no brand owns this niche

Review moat

Good579.96

avg incumbent reviews — the moat a new listing must climb

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Competition

Good49%

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

Avg price

Good£13.08

avg listing price — sweet spot $15–$100

Conversion

Okay3.9%

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

Returns

Okay3.1%

return rate — above 5% kills the launch gate

Price range

Okay£3.46–£23.67

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

Market size

Okay£208K

£208K/yr · 408K searches

Growth

Okay+0.8%

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

Signals No Dominant Brand Low Review Barrier

According to Flapen's Amazon United Kingdom niche tracking, toilet flush system is a £208K/yr Amazon United Kingdom market (408K searches/yr). The top 5 brands hold 55% of demand. Verdict: Worth a look — 52/100.

Data updated Jul 22, 2026 · scored weekly · How we score niches

toilet flush system market data

Units sold / yr: 13K–15K; avg 250–500/product
Revenue / yr: £164K–£196K; units × avg price
Conversion rate: 3.9%
Avg BSR: #131
Page quality: 0%
Prime: 93%
Sponsored: 89%
Out of stock: 8.9%
Avg brand age: 33 months
Avg seller age: 164 days

Competition & brand share

The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.

Brands

22 falling

Sellers

Top-5 brand share

55%

Top 20: 98%

Top-5 click share

49%

Top 20: 93%

Open market

39%

Hulthor19%
Ibergrif12%
Fluidmaster9%
Apragaz8%
Fzosinou7%
XWGKLN6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +0.8% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.3×

Open Trend

Top toilet flush system search terms

toilet flush system replacement103K/yr +3.5%2.5% conv.
toilet cistern flush parts50K/yr -1.8%2.9% conv.
toilet flush40K/yr +3.8%2.1% conv.
cistern flush replacement26K/yr -3.9%1.9% conv.
flush valve19K/yr +6.2%1.3% conv.
toilet flush valve23K/yr -15.1%1.5% conv.
toilet system replacement kit12K/yr +19.0%3.2% conv.
toilet flush system17K/yr +12.3%2.0% conv.
toilet syphon16K/yr +0.4%2.8% conv.
toilet cistern parts15K/yr +3.4%1.4% conv.

All search terms

Top toilet flush system 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★)1 product missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Toilet Flush System Replacement Toilet Syphon Replacement Kit - Hulthor

Hulthor£12.354.6★165 rev

Ibergrif M20522 Toilet Dual Flush Valve with Button Suitable for 2 Inch (59-61MM) Toilet Flush System Replacement Adjustable White

Ibergrif£9.264.4★6,405 rev

Apragaz Toilet Flush System Replacement Dual Flush and Fill Toilet Cistern Kit with Universal Ldual Flush Cistern Valve Adjustable Height Cistern Flush Replacement for 2 Outlet

Apragaz£20.014.4★122 rev

Toilet Flush System Replacement Adjustable Bottom Entry Toilet Fill Valve High Pressure Cistern Fill Valve - Prevents Backflow for Home Bathroom Tank Maintenance Water Saving

Fzosinou£8.324.4★14 rev

Toilet Flush System Replacement Dual Flush Adjustable for 25-30cm Tank

XWGKLN£12.973.8★21 rev

Newest

by launch date

KeyPlumb 1.5 Dual Flush Valve with 2 Adaptor Mechanical Toilet Cistern Valve WRAS Approved Water Saving Flush System Chrome Push Button 250mm Height Easy Fit Replacement

Excel Home£13.260 rev

3mo ago

Watermark Dual Flush Valve Kit WMKA20080 AS1172.2 Toilet Cistern Replacement 2 Outlet WRAS Approved Push Button Fixing Kit 290mm

Generic£15.5014 rev

6mo ago

Toilet Flush System Replacement Dual Flush Adjustable for 25-30cm Tank

XWGKLN£12.9721 rev

6mo ago

Toilet Flush System Replacement Adjustable Bottom Entry Toilet Fill Valve High Pressure Cistern Fill Valve - Prevents Backflow for Home Bathroom Tank Maintenance Water Saving

Fzosinou£8.3214 rev

7mo ago

Seven-Flower Toilet Flush System Replacement with Button Dual Flush Valve & Fill Valve Kit with Adjustable Height for 2 Outlet Universal Toilet Cistern Flush Parts for Efficient Water Saving

Seven-Flower£16.6811 rev

10mo ago

What buyers say about toilet flush system

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

What buyers love

Size-Overall27%

“Easy fit”

Quality-Overall19%

“Excellent Quality”

Assembly/Installation11%

“Easy to install”

Advertised Vs Actual Product10%

“was just what I needed”

Value For Money8%

“Good price”

Ease Of Use4%

“Quick and easy”

Adjustability/Rotatability/Reclining3%

“This is as they say adjustable which suits a lot of toilets”

Leak-Proof2%

“This fixed our leak”

Instructions/User Manual/Troubleshooting2%

“Comes with full instructions that are very clear to follow”

Efficiency1%

“Works like it should”

What buyers complain about

Size-Overall18%

“Does not fit”

Durability16%

“Keeps failing”

Quality-Overall13%

“Poor quality”

Leak-Proof8%

“what's not ok is the tank to base seal it leaks badly it just pours out when flushing”

Instructions/User Manual/Troubleshooting5%

“The instructions werent super clear”

Water Resistance3%

“Sadly this item will not stop letting in the water so I have to manually turn the water off”

Advertised Vs Actual Product2%

“Its not clear from the product diagrams”

Assembly/Installation2%

“I haven't had a chance to install this yet”

Adhesion/Stickiness2%

“Started to stick after 5 months”

Defective Material/Parts2%

“Parts missing and appalling quality”

Top return reasons

Size-Overall63%

Compatibility-Overall13%

Defective Material/Parts6%

Functionality-Overall3%

Advertised Vs Actual Product3%

Maintenance And Repair1%

Leak-Proof1%

Quality-Overall1%

Connectivity-Overall1%

Product Condition1%

Common questions

Is toilet flush system profitable to sell on Amazon United Kingdom?: The niche generates £208K/yr across 27 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is +0.8%. Flapen's verdict: Worth a look (52/100).
How competitive is the toilet flush system niche?: 22 brands and 46 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 55% of demand.
What do buyers complain about in toilet flush system?: Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 3.1%.
When does demand for toilet flush system peak?: Demand is steady year-round — the busiest month runs 1.3× the quietest.
What does it cost to enter the toilet flush system niche?: Listings span £3.46–£23.67; the average listing price is £13.08 (sweet spot $15–$100). The average incumbent carries 580 reviews — the moat a new listing must climb.