Here refrigerator piping details including protective sheild , 10mm thick gusset plate, 12mm steel anchor, rigid insulation , 250mm x12mmx 12mm base plate , grout Refrigerators work by causing the refrigerant circulating inside them to change from a liquid into a gas. This process, called evaporation, cools the surrounding area and produces the desired effecting early refrigerators, cork expanded polystyrene ( Thermopolis ) sheets or granules were used for insulations. For more details of Refrigerator piping details download this file.