Seal joints between lengths of tubing with special “peel-and-stick” seam-sealing tape or foil duct tape. If your cold water pipes are sweating more than you are on these hot summer days, here’s the simple cure. Run down to the local home center, lumberyard or hardware store and pick up some foam pipe insulation.Click to see full answer. Also know, why is my cold water line sweating?Sweating occurs when the water inside the pipe is much colder than surrounding humid air. In either case, when warm, humid air reaches cold pipes, drops of moisture form and drip as if there was a tiny hole in the pipe.Also Know, is condensation on AC pipes normal? It is normal for condensation to be around the drain pipe, this is a common sign of the AC unit being hard at work, even more so on hot and humid days. Additionally, if there is a collection of water under the units condenser, then it is probably normal operations at work. Subsequently, question is, why is there condensation on my copper pipes? Metal cold water pipes, including copper and galvanized steel, account for the most significant condensation issues, while plastic piping sweats less. Pipe condensation occurs when airborne moisture comes into contact with a cool surface, such as a cold water pipe.Is it normal for pipes to sweat?Sweating water pipes are a common occurrence that can lead to excessive dampness, especially in residential basements. The process is the same as a glass of cold water sweating on a hot and humid summer day. Although the process is completely normal, it can lead to increased moisture in your home.