The object is for each player to create a pipeline of a designated length that begins with a valve and ends with a spout.
Players race to be the first to complete a continuous, leak-free pipeline that connects their valve card to their spout card, while opposing players try to give them leaks that must be fixed.
The valve card is placed on the table to begin a player's pipeline.
A number of different pipe shapes (L-bends, T-pipes, straight, etc.)
[1] The minimum length of the pipeline required to win varies by the number of players, as follows: Winning Moves Games has reissued the game as Waterworks Classic.