The Prisma Classique Under Basin Water Heater 10L has a Glasslined Inner Cylinder, offering a long life to the cylinder. The unit has a shiny non-corrosive polypropylene outer casing, which provides aesthetic appeal and will not discolour over. Thick polyurethane foam insulation is used to reduce inner cylinder heat loss. Working pressure 0kPa. Fitted electrical cable with 15 Amp 3 Pin Electrical Plug. It comes with a 5-year warranty to ensure durability and peace of mind.