Delphi Product & Service Solutions' DPF300 Master Series offers heavy duty diesel particulate filter (DPF) maintenance for efficient operation of modern engines. The Hartridge DPF300 Master Series is an essential tool for extending diesel particulate filter life, according to the company. It uses proven patented technology to help remove all soot and ash to restore the function of clogged DPFs, as well as return backpressure to its original specifications. The typical cleaning time takes approximately 15-45 minutes depending on the volume of air supply available and the state of the DPF.