Uniweld 40061 Sludge Blaster Cleans A/C Condensate Drain Lines without having to access the drain pan Clears condensate drain lines of sludge and algae in seconds With the use of Nitrogen, CO2 or water the Sludge Blaster expands inside the pipe and blast the clog and sludge free from the drain line Attaches to Uniweld Part No H2SSM 2-Feet Service Hose or Part No H5SMY 5-Feet Service Hose Three Easy Steps and done