Correct, its a brass adapter that converts the water supply. It's 100% correct that some plumbing products should have a WELS rating. Saving water is an important thing for us all to try to acheive - right? Maybe though, your European brand is imported here in Australia so if it has a WELs rating then that would apply to your product, no matter where you bought it. You may also be able to take advantage of a warranty that applies in a different country. You just need to read the fine print.

Are you left or right handed? Place it where ever is the most natural for you to reach. Ensure it's not too close to the wall (if that may be an issue). Cheers, Penelope

Save big money on importing one from the UK and spend it on design to make the space work for you without the need for such an impractical solution. There are some cute, tiny wall mounted hand basins which would be a neater solution. https://www.reece.com.au/product/basins-c448/wall-mounted-basins-c452/axa-cento-mini-wall-basin-right-hand-with-fixing-1-9505814 If there is no other option here is another type of toilet/handwash product, but I don't think it looks any better than the Caromo design, although overcomes some of the impracticalities mentioned in the previous comments. https://www.reece.com.au/product/basins-c448/wall-mounted-basins-c452/roca-w-w-integrated-washbasin-white-5-star-9505427 Best of luck, Dr Retro of Dr Retro House Calls/Dr Retro Virtual Visits

There are all ways pros and cons. My husband doesn’t like wall taps as they can leek into wall, but hey all showers have wall taps. Yes you drip water behind sink with a wall tap as happens with an undermount sink. But the base of tap doesn’t get grimy like a sink mounted tap. With a wall tap you may need a long spout to get over sink, as you do with an undermount sink if you have a bench mounted tap behind the sink. So many choices. Buy what you love.