J-P Ultra shoots out of any jetter. It melts and liquefies grease stuck to the walls, doubling its effectiveness. This degrades grease, preventing it from re-coagulating downstream. It also coats the interior of the lateral and main lines to prevent grease buildup. Despite its strength, it is completely safe for your entire system. It will not disrupt bug or enzyme systems in treatment plants. It is not harmful to wildlife, fish, or humans.