Omnipure's K-Series filters feature self-contained inline filters with optional Quick-Connect® compression fittings, allowing for installation and replacement in a matter of seconds without the use of tools. This allows for simple, fast, hassle-free filter replacement install. With a diameter of 2" or 2½", they are available in lengths of 6", 8", 10", 12" and 14". The inlet and outlet ports are available in 1/8", 1/4", and 3/8" female NPT (National Pipe Thread). Quick-Connect® fittings are available in 1/4" and 3/8", straight and elbow configurations. Review the fitting options on this page to match the fittings on the filter to be replaced.