Foam Maker is an air-aspirating foam discharge device designed to protect floating roof, flammable liquid storage tanks. Its additional applications include protection of diked flammable liquid storage and spill areas. The Foam system design guidelines generally used are in accordance with NFPA11 standard. The Foam Makers are defined by NFPA 11 as Type II discharge outlets for delivering the low expansion aspirated foam to the seal. HD foam maker is UL Listed and FM Approved.