Pleated filter may be used to filter liquids or gases with high efficiency. Pleated cartridges are manufactured from a durable polypropylene media. They are resistant to bacterial attack and compatible with a wide range of Chemicals. Ends are immersed in a thermo setting vinyl plastisol. Embedding and sealing each end of the pleat block in this fashion fuses components together to form a unitized end cap and gasket. The overlap seam is conically welded to reduce internal bypass, improving filtration efficiency.