The FilterBOSS COMMANDER is a duel filter controller that also allows for onboard fuel polishing. The 1" square helm mounted "Early Warning Panel" allows an advance warning that the filter is clogging by an amber LED. A green LED indicates when the fuel pump is on. This modular system allows for the mounting of the COMMANDER along with two filters and an integrated fuel pump, in the best configuration for your boat. The bleed port along with the integrated fuel pump helps with filter servicing or engine bleeding as well acting as a fuel polishing system. The "Filter Filler" helps to top off the filter when changing elements. Additionally, the fuel pump can supply fuel flow to the injector unit if the engine lift pump fails.