A hot water Scalder. Before plucking and after the birds have bled out, the birds are conveyed through a water tank filled with hot, scalding water. Hence the name of the machine: scalder or scalding tank. The water is be heated by heating elements and functions to open the pores, help loosen the feathers from the skin. Blowers inside the tank will create turbulence in the water, meaning the birds are completely immersed and scalded.