The Easi Plumb AquaMild Appliance Hose - Blue is used to connect an appliance to the water supply. This hose is made of durable PVC and features a magnetic descaling device. The build-up of scale deposits can be a common and costly problem in hard water areas. The water flows through the magnetic field which prevents the formation of limescale. Fitting instructions are found on the back of the packaging. This hose is colour coded to indicate whether the connection is hot or cold water, red being hot water and blue cold water.