Wizard-Kleen Dual Function Water/Nitrogen System is the ONLY original US Patent & Patent Pending product of its kind utilizes a Hydro and/or Compressed Nitrogen gas system for cleaning drain line with no chemicals and is environmentally friendly. This product model is ideal for flushing with water and/or blowing out with compressed gas sludge & slime where there is no easy access to a water hose line. Works with other manufacture electronic water detection systems. Wizard-Kleen is for both Residential & Commercial applications usage.