Since 1976, PEP Filters has been the leading manufacturer of automatic backwash media filtration systems. PEP Filters is the most recognizable name in sand filtration technology. Arkal Filtration Systems has been the leading manufacturer of automatic backwash disc filtration systems since 1963. The combination of the two companies has created the most comprehensive offering of automatic backwash, pre-engineered, self-cleaning filters available from one source. We offer media, disc, screen, bag, and cartridge filtration, as well as centrifugal separators and sweeper jets.