The present invention consists in applying on the lid the zinc coffin an intake valve connected to a pipe inside the zinc coffin, an inspection glass, two vent output valves, appropriately set at a certain pressure and adapted to the use, redounded, connected with two high-pressure flexible pipes to an air space, with two intake valves set at a pressure lower than the vent valves. On the air space a further outlet valve towards an optional further air space outside the wooden coffin, to be used either as a pressure outlet or to be connected to a high-pressure flexible pipe before opening the coffin, in order to discharge or to suck pressurized mortuary smells in the zinc coffin, to be introduced directly into appropriate containers to be emptied in the sewers, avoiding the leakage of mortuary smells from both the zinc coffin and the air space possibly pressurized full of smells, by preserving the gas, avoiding their emission and thus guaranteeing the inappropriate explosion of the zinc coffin due to the pressure increase.
