Don’t make this expensive mistake, choose the right Quooker instant hot water tap. The kitchen company ordered the wrong model and now we got to wait until the new year to get it resolved. Quooker have a few models and you should always make sure you order the right one. The COMBI does not rely on a separate hot water supply. The PRO7 and PRO3 rely on you having a separate hot water supply so always ensure you get what you need. Also note that this system does not leave much space under your kitchen sink especially when your base unit is 600mm wide. You will not be able to fit a shelf as there is way too much going in that unit. As far as the system and tap, Quooker is quality and even though you pay for it it’s well worth it. If you looking for an instant hot water tap always check on Quooker website for details on the right model you require. I thought this day was going to be a straight forward day having to plum the sink and tap in but with all the issues and access it turned out to be an eventful day. The granite company installed the worktops and drilled the tap hole but left little to no access for me to install the tap.