Getting pipe placement correct can be a little trciky at first, especially if you're using one of the smaller screen Windows Phone devices. Nonetheless, with a bit of practise, you'll soon be plumbing like a pro.
PipeMania is a free download in the Windows Phone marketplace.
Description and screenshots:
PipeMania is where you can quickly sneak out of your rut in to the green lawn of Waterland. The quick moves required to create a maze of pipes for each level will surely activate your gray matter. So, just get on challenging your own scores as the difficulty level increases for each round. Pipe it up before you are splashed.