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You always want to solder correctly, the biggest mistake most people make when soldering is failing to get the interior of the fitting and the exterior of the pipe clean and shiny. Polish these surfaces with a fine emery clot until bright. When soldering, never heat the pipe, but instead heat the fitting. Doing so allows the solder to be drawn into the fitting by capillary action. When starting a plumbing project that is due to loud noises in your pipes empty the pipes first. This can be an