Uniweld’s 40040 Nitrogen Sludge Sucker & Blaster Kit specifically designed for the following applications: Purging copper lines with low pressure nitrogen, pressure testing a system for leaks, cleaning a condensate drain line. The Sludge Sucker® is a tool that was developed to clean out a condensate drain line without having to access the drain pan located in the A/C System’s Air Handler. The Sludge Sucker’s clear vinyl hose is attached to the 3/4-Inch PVC condensate drain line on the outside of the building. With the use of Nitrogen, CO2, or water suction is created that pulls all the sludge and algae from the drain pan and drain line; then blows it onto the ground outside. The Sludge Blaster® is inserted into the drain line (Pipe Capacity: 3/4-Inch to 1-Inch) and expands inside the pipe with the use of nitrogen pressure to blast the sludge and algae free. Capabilities can be expanded with rubber plug adaptors, needle tip, air chuck and accessories purchased separately. Kit Includes: Part No. RHP400 Nitrogen Regulator – Maximum Delivery Pressure up to 400 PSI, 1/4-Inch Male Flare Outlet Connection, CGA580 Inlet Tank Connection and protective rubber gauge boots, Part No. 40000 Sludge Sucker, Part No. 40061 Sludge Blaster, Part No. H5SMBY 5 Ft. Service Hose, Part No. H2SSM 2 Ft Service Hose, Part No. BG1 Blowgun, Part No. 516 Metal Carrying Stand for 40 Cubic Feet Nitrogen Tank (Tank Not Included – Sold Separately).