The water seal is what keeps the smell out · review
The only trap in this catalogue that publishes the clearance it needs — it fits where there is less than 15 cm under the basin.
The bottom line The trap that fits where nothing else will, and the only one that tells you so with a number. Its seal depth remains, like everyone else's, unpublished.
A flat, space-saving plastic basin trap with a G 1 1/4 in inlet and a 32 to 40 mm outlet, an integrated sealing ring, hand-tightened connections and no tools required.
“Fits under basins with less than 15 cm of clearance.”
That is the specification of a flat trap, and it is the only one in this catalogue that gives it. A conventional bottle trap hangs down a long way; when the space is taken by a drawer or a shelf, none of them will go in.
32 to 40 mm. Both common European waste sizes, without a reducer. If you do not know what is in the wall behind your basin — and most people do not until they look — that range removes the problem.
No tools, and the maker states it can be cleaned without dismantling. On a trap installed inside a tight cabinet, being able to clean it where it sits is not a luxury.
Water seal depth. Flat traps hold a shallower column of water than bottle traps as a class, and the depth is what decides how long the seal survives a long absence before drain smells come back. No maker on this shelf gives it.
On sale at around 15 € on the German, French, Italian and Spanish Amazon stores at the time of checking.
Also on sale on the British Amazon store, in the local currency: the range above is measured on the euro stores only.
Not found on the American Amazon store, where the buy link falls back to a local search rather than to a page that does not exist.
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.
| Inlet size | G 1 1/4 in — stated |
|---|---|
| Outlet size | 32 to 40 mm — stated |
| Water seal depth | Not stated by the maker |
| Body type | Flat, space-saving, with an integrated sealing ring — stated |
| Space needed under the basin | Fits under basins with less than 15 cm of clearance — stated |
| Material | Plastic, stated as corrosion-free and dimensionally stable |
| Dismantles without tools | Yes — the connections are hand-tightened, stated |
| Amazon reference | B0GLQ4KRPR (same reference on 5 Amazon marketplaces) |
| EAN | 8721515800368 |
When the space under the basin is already taken — by a drawer, by a shelf, by a washing machine outlet, or by a basin fitted unusually low. A conventional bottle trap hangs down a long way, and a flat trap does the same job inside a fraction of the height.
That depends on the water seal depth — the depth of water held in the bend — and no trap in this catalogue publishes it. As a class, flatter traps hold less. If the basin is used daily the seal is topped up constantly; it matters over a long absence.
Trap · stainless steel, chrome · 1¼ in connection stated · opens for cleaning · complete set with wall rosette
A seven-euro stainless trap supplied with the wall rosette — the small chrome disc that everyone forgets and that makes the pipe look finished.
Best for: A visible trap under a wall-hung basin, where it will be looked at and the budget is small.
≈ £9 / 8 €
Trap · space-saving · 1¼ in connection × Ø32–Ø40 outlet · single chamber, stated inspectable · plastic
An Italian-made space-saving trap that states it is inspectable — meaning it opens to be cleared rather than being taken apart.
Best for: A replacement where the existing pipework is of unknown diameter and the trap has to be openable.
≈ 16 €
Trap · plastic · 1 1/4 in inlet × 32 mm outlet stated · space-saving body · lower part unscrews separately · no special tools
A ten-euro plastic trap that publishes both its sizes — 1 1/4 in in, 32 mm out — which is the pair that decides whether it connects at all.
Best for: A trap hidden inside a vanity unit, where nobody sees it and the drain cleaner does.
≈ 10 €
