Uniweld 40053 Rubber Plug Adaptor, 1-1/2-Inch Rubber Plug Adaptor, 1-1/2 Inch x 2 Inch Tapered Cone with 1/4 Inch Male Flare Fitting Blow out clogged sink drains, copper lines, aluminum tubing, hoses and condensate drain line with the use of Nitrogen, Air, CO2 or water Attaches to Uniweld Part No H2SSM 2-Feet Service Hose or Part No H5SMY 5-Feet Service Hose