A waterfall tap is a tap where the top part is cut out, so that you can see the water coming out of the spout. It gives an appearance rather like a waterfall, and this is where the name comes from. This kind of design has been popular for quite a long time now, but it is showing no signs of going out of fashion. In fact, waterfall taps are incredibly popular and will still have quite a high price tag.
A waterfall tap shouldn’t be any more difficult to plumb in than a regular tap, as it isn’t any different in terms of the plumbing. Make sure you have the right water pressure – you will need it to be quite high in order to get that waterfall effect. Most retailers of bathroom products will stock taps like these and there are different designs and price points to suit different homes.