PP filter element is made of ultrafine polypropylene fiber film, without any cement, no leakage, no secondary pollution. PP Sediment filter : Polypropylene replacement, cartridge for removal of : Sand, Silt, Dirt and Rust Particles. For water use only. This cartridge fits most standard in-Line Filter Housing. Maximum Water temperature 52.Micron rating is nominal. Installation and housing design can affect performance. This filter will not remove cysts, bacteria or viruses.