Uniweld 40055 Nitrogen Sludge Sucker Maintenance Kit was specifically designed for multiple uses in the HVAC/R and Maintenance Industry. For example: 1. ) Purging copper lines with low pressure nitrogen during the brazing of copper tubing in Air Conditioning and Refrigeration systems. The nitrogen must be flowing to displace the oxygen inside the tubing during the brazing process, preventing internal oxidation and the resulting scale. Scale build up inside the tubing can cause blockage in the TXV and within the Air Conditioning and Refrigeration system resulting in premature failure. 2. ) Pressure testing a system for leaks prior to pulling a vacuum and charging the system with refrigerant saves time and money! 3. ) Cleaning a condensate drain line is easy with the Sludge Sucker or Sludge Blaster . 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 and with the use of Nitrogen, CO2 or water sucks all the sludge and algae from the drain line. The Sludge Blaster is inserted into the drain line (Pipe Capacity: 3/4 Inch to 1 Inch) and expands inside the pipe and blasts the sludge and algae free. This kit includes an air chuck to fill up flat tires, a needle tip for blowing off coils and rubber plug adaptors for blowing out copper lines, aluminum tubing, hoses and condensate drain line. 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. H5SMY 5 Ft. Service Hose, Part No. H2SSM 2 Ft. Service Hose, Part No. BG1 Blowgun, Part No. 40048 Needle Tip, Part No. 40050 1/2 Inch Rubber Plug, Part No. 40022 3/4 Inch Rubber Plug, Part No. 40045 Air Chuck