For seriously clogged drains, professional plumbers may use a hydro jet. This instrument is inserted by a plumber deep into the drain and sends high pressure water through the pipe to break down obstructions with sheer force.
This tool is often faster and more efficient than a typical drain snake or more environmentally friendly than chemical gels or liquids that dissolve the source of the clog but are also likely to damage pipe coatings and send harmful chemicals into waterways.