Aqueduct!

Welcome to Aqueduct a world of jumbled waterways and mixed-up pipelines. Its up to you to rearrange the tracks and restore the flow. easy to pick up and play wherever you are - CNETthe most fun with plumbing since Mario - Wiredhours upon hours of puzzling goodness - TouchArcadepure puzzle awesomeness, plain and simple - JayIsGamesa fabulous noggin-busting puzzle game - Gamezebo