Pipes carry water through the hidden walls of a house, so they are read as the inner channels of feeling. Clear pipes stand for emotions flowing well; blocked ones for something held back.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.