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Siamp Diaphragm Washer

Fail

Shoppers spend an estimated $45K a year here, so Siamp Diaphragm Washer is a Fail.

Flapen Score
48
48 / 100
Ranks 388 of 740 Business, Industry & Science niches · −1 vs the category median of 49
Market size
£45K/yr63K searches / yr
90-day growth
-5.7%search demand this quarter
Competition
50%top-5 click share · 17 brands · 38 sellers

Flapen Score

Siamp Diaphragm Washer against its category

The dotted line is the Business, Industry & Science average. Past it, Siamp Diaphragm Washer is stronger. Inside it, weaker.

48Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Siamp Diaphragm Washer market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Siamp Diaphragm Washer 63K times last year and spent an estimated £45K. The top 5 brands take 83% of clicks. Flapen scores it 48 out of 100, a Fail.

01 · Demand

An estimated 8.1% of those searches ended in a purchase.

Shoppers searched for this 63K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 8.1% of those searches ended in a purchase. Searches in the last 90 days moved -5.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated £45K a year.

Searches, last 12 months
63K
Growth, 90 days vs prior 90
-5.7%
Conversion, latest week
8.1%
Market size, estimated
£45Ka year
Top search term
siamp flush valve20K searches a year

02 · Price

A sale here is worth £8.74.

Listings sell for £8.74 on average, from £2.64 to £26.64. Amazon reports units sold in ranges. This niche sold 6K to 8K a year. The average listing sells 100 to 250 of them. At £8.74 that is £874 to £2K a year per listing.

Average price
£8.74under the $15 to $100 sweet spot
Price range
£2.64–£26.64
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
6K–8K
Units per listing a year
100–250
Revenue per listing a year
£874–£2K
Returns
0.9%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is low.

43% of listings pay for placement with sponsored ads. 73% ship with Prime. On an average day, 7.4% of listings are out of stock. The average listing ranks #73 within Hydraulics, Pneumatics & Plumbing. It carries 656 reviews at 4.41 stars, so a new listing needs social proof before a better product.

Sponsored listings
43%
Prime listings
73%
Out of stock, average day
7.4%
Average rank
#73in Hydraulics, Pneumatics & Plumbing
Average rating
4.41 starsAmazon United Kingdom average 4.36 stars
Average reviews
656per listing
Listings tracked
30

04 · Newcomers

0 of last year's 6 launches cleared the first-year sales bar.

6 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 29 months on average, so a newcomer is not facing entrenched names.

Launched, last 12 months
6
Successful launches
0Amazon's first-year sales bar
Average brand age
29 months

Products

Top Siamp Diaphragm Washer 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 21, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 50% of clicks. Leaders hold, but buyers still shop past them.

£0£2K£4K£7K£9K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

17 rising

Sellers

38

Est. top-5 brand share

83%

Top 20: 100%

Est. top-5 click share

50%

Top 20: 90%

Open market

15%

  • SIAMP46%
  • Taps2Traps22%
  • Generic7%
  • NEKAWA4%
  • Kaelosyn4%
  • VBSYUYQ2%
  • Open — no brand owns it (11 brands, 15%)

Demand

Siamp Diaphragm Washer search demand

Weekly searches over the year. Pick a range.

1K750Mar '26Mar '26Apr '26May '26May '26Jun '26Jul '26

Search terms

Top Siamp Diaphragm Washer search terms shoppers use

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

  • siamp flush valve20K/yr
  • siamp diaphragm washer10K/yr
  • siamp optima 506K/yr
  • diaphragm washer4K/yr
  • siamp optima 497K/yr
  • siamp5K/yr
  • twyford toilet cistern spares4K/yr
  • vitra toilet parts4K/yr
  • diaphragm washer for cistern float valve3K/yr

Reviews and returns

What reviews say buyers love and hate about Siamp Diaphragm Washer

We read the reviews and the return reasons for every product selling here.

27%of positive reviews mention “Size-Overall”
29%of negative reviews mention “Functionality-Overall”
0.9%of orders come back
“Didn't work”
A buyer, on “Functionality-Overall”29% of negative reviews mention the same topic

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

NegativePositive

FAQ

Common Siamp Diaphragm Washer 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