1. J

    Mystery Pipes (and 2" or 1.5")

    Hi, I am moving my pool pump and filter about 15 feet, so I am starting to plan for extending my plumbing. While doing so, I came up with a couple mystery pipes: One (marked "A" in the picture) is 1.5" and always seems to have a little water in it, usually above ground/pool level. Today, the...