Compact and Lightweight Cartridge Filters are provided with screw type air bleeder for easy removal of trapped air inside the filter tank. These Cartridge Filters are equipped with oil filled pressure gauge for easy inspection of the operation pressure. These Cartridge Filters are offered with UV-resistant tank and available in compact, lightweight design that facilitates ease of usage. Compact and Lightweight Cartridge Filters have heavy duty ring lock lid which permit easy cleaning and replacement of cartridge element.