The parts under the basin, sold as a considered product
What the catalogue shows
Basin taps and countertop basins, and then the parts that go under them: pop-up wastes in slotted and unslotted versions, bottle traps, and angle valves.
Why that combination is useful
Because those are the parts bought in the wrong version. A waste is slotted or unslotted, and the two look identical in a photograph; a brand that sells both and labels them clearly removes the single most expensive mistake in this family.
What to still check
The water seal depth of a trap, and whether the waste matches your basin’s overflow. Neither is answered by the brand.
Pop-up waste · 1¼ in stated · slotted, for a basin WITH an overflow · push-push · chrome-plated brass · plug and strainer lift right out · 5-year warranty
A chromed brass waste whose plug and strainer pull out completely — which is the difference between cleaning it in ten seconds and not cleaning it.
Best for: A basin with an overflow in a household with long hair, where the waste actually has to be cleaned.
Basin mixer · ceramic cartridge · replaceable aerator · two DVGW-tested 50 cm G3/8 hoses · 5-year warranty stated
A chrome basin mixer sold as a complete, tested set: a ceramic cartridge, a replaceable aerator, two certified 50 cm hoses and a five-year manufacturer warranty.
Best for: A shallow inset basin where a flat spout suits, and where certified hoses and a long warranty are worth the premium.
A chrome waterfall mixer sold as a complete set with certified hoses and a five-year warranty, from a range better known for the parts under the basin.
Best for: Someone buying the whole basin — tap, waste and trap — from one range, and choosing on appearance.