With a gravity fed system you only usually have mains pressure coming out of your cold water taps. Your hot water is normally fed from a large tank situated in the loft which uses gravity to flow into the hot water cylinder then on to the hot water taps. These Aqualisa Q Digital Mixer Showers are designed specifically to run on a gravity fed system and come with all of the showering gadgets you’ll ever need. The wireless remote allows you to pre-heat your perfect shower, select an eco, sport or family mode and even display everything it’s doing on a glass screen. It really is total showering luxury.