A cooktop on a kitchen island fed with LPG: drawn on the floor plan, M.E.P.flow drops the copper through the island past a sediment trap and shut-off valve, sleeves it through the slab, brings it up the outside wall to a lockable valve and a second-stage regulator on a strut rack, buries it 450 mm deep under a warning tape, and takes it to a 1.9 m³ tank 3.7 m from the house. 0.46 m³/h for 12 kW loses 0.24 mbar in 12.7 m of 15 mm copper.