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Calmwaters oval duroplast seat, 250 kg to DIN 19516, two fixing systems review

The strongest seat in this hub at a tested 250 kg, and the only one supplied with a second fixing method for a pan whose holes are closed underneath.

The bottom line The best-documented seat in the hub and the one most likely to fit an awkward pan. Its antibacterial figure is a material test, and this page treats it as one.

What you are getting

A white oval seat in antibacterial urea duroplast, with two fixing systems, pre-assembled tilt anchors, stainless fixings, stick-on wall buffers, double soft-close, and 250 kg tested to DIN 19516.

Two fixing systems is the practical differentiator

The commonest reason a seat cannot be fitted is not size — it is that the pan’s fixing holes are closed from below, so nothing can be reached with a wing nut. Wall-hung pans and many modern back-to-wall pans are like this.

This seat ships with both a conventional fixing and a top-tightening tilt anchor. One box, either pan.

250 kg, to a named standard

The highest here, and cited to DIN 19516 rather than asserted. Two other seats in this hub cite the same standard at 150 kg; two publish a bare number.

What the antibacterial figure means

“99.99 % fewer bacteria, certified to ISO 22196.”

That is a real standard and a real test: bacteria applied to a material surface under laboratory conditions, counted after a set time. It describes the plastic.

It does not describe your bathroom, which is decided by what gets cleaned and how often. This page reports the standard and stops there.

What is still absent

The dimensions. As with almost every seat on this shelf, measure your pan first.

Availability

On sale at around 40 € on the German Amazon store at the time of checking.

Listed but with no offer on the American, British, French, Italian and Spanish Amazon stores — the reference exists there and nobody is currently selling it.

Prices and availability are what Keepa reported on the date this page was updated; both move.

Prices quoted in this text were read on 5 September 2026. The live price is at the top of the page.

What we like, and what we don't

Strengths

  • 250 kg to DIN 19516 — the highest tested figure in this hub by a hundred kilograms
  • Two fixing systems in one box, including one for pans whose fixing holes are closed from below
  • Stated Made in EU, with stainless fixings and stick-on wall buffers supplied

Compromises

  • No dimensions published, on the seat that otherwise documents itself best
  • The 99.99 % figure is a laboratory result on the material surface, not a statement about the bathroom
  • Plug-fixing removal rather than a one-button quick release

Specifications

LengthNot stated by the maker
WidthNot stated by the maker
Hinge hole spacingNot stated by the maker
MaterialAntibacterial urea duroplast, stated to reduce bacteria by 99.99 % and certified to ISO 22196
Hinge type and fixingTop fixing with pre-assembled tilt anchors and stainless fixings, plus an alternative fixing for closed holes — stated
Quick-releaseRemovable via a plug fixing — stated
Stated load capacity250 kg, tested to DIN 19516 — stated
Amazon referenceDE B07QTWQLT9 · US B07QTWQLT9 · GB B07X6TYB39 · FR B07X6TYB39 · IT B07X6TYB39 · ES B07X6TYB39
EAN4251280306030

Questions people actually ask

What is an "alternative fixing for closed holes"?

Some pans — especially wall-hung ones — have fixing holes you cannot reach from underneath, so a conventional bolt and wing nut is impossible. Tilt anchors expand inside the hole and tighten from above. Supplying both methods in one box means the seat fits either kind of pan.

What does the ISO 22196 certification actually say?

It is a laboratory test of how a material surface performs against bacteria applied to it under controlled conditions. The 99.99 % figure belongs to that test. It is a real, named standard — and it is a statement about the plastic, not about the hygiene of your bathroom, which is decided by cleaning.