The PX051 sediment cartridge is compatible with most liquids and are highly effective for sediment, rust, sand, silt, algae removal. PX cartridges have no chemical residues. The economical Puretec PX Series cartridges are constructed from virgin polypropylene which is spun and melted simultaneously. This innovative technique means there is no centre core to restrict filter performance. Precise depth filtration is achieved through graded density construction.