Water jetting is the latest drain cleaning technique plumber's use. It involves sending highly pressurized water into the drain line. Water jetting is the best for removing grease clogs inside drain pipes. Traditional drain cleaning machines don't help remove grease clogs while sewer cleaning machine blades may spin around but don't remove grease clogs. A water jet is also helpful at removing sediment or debris inside drain pipes. However, it's an added drain cleaning expense that's not so useful in other cases.