Hexacto's Bob the Pipe Fitter 1.01
the author of this app says:
Even if you don't know a socket-weld elbow from a lift-swing valve, Bob the Pipe Fitter will keep you going for hours with its fast-paced connect-the-pipes action for the PocketPC. Bob is your mentor, encouraging you as you try to connect the pipes that drop from above. It's a crazy race against time to make as many connections as possible.
A four-piece loop makes a pipe bomb that blows away the surrounding pipes for extra points and more room on the playing board.