🔧Pipe Puzzle
Play Pipe Puzzle (Flow) online for free: drag to connect matching coloured endpoints and fill every cell, three difficulty levels with hints
Connect every matching pair and fill the whole board
Press on an endpoint and drag across adjacent cells to lay pipe; click an endpoint to clear that whole line and reconnect. Connect every matching pair and fill every cell with pipe. Z undo, H hint, R restart.
How to Use
Pipe Puzzle (also known as Flow) is a connecting puzzle: the board holds several pairs of matching coloured endpoints, and you must link each pair with a pipe while covering every cell on the board with no gaps. Pipes may only run through adjacent cells up and down or left and right, and different colours may not cross or share a cell. It looks simple, but as the board and colour count grow you need to plan routes ahead or you will block yourself. This version offers 5x5, 6x6 and 7x7 difficulty levels, with hints and one-click reshuffle.
FAQ
What are the rules of Pipe Puzzle?
Connect each pair of matching coloured endpoints with a pipe, and cover every cell on the board — no gaps, and different colours must not cross.
Why does the hint say there are still gaps?
Pipe Puzzle requires more than connecting the colours: every cell must be filled. If all colours are joined but empty cells remain, reroute pipes to include those cells.
How many difficulty levels are there?
Three: 5x5, 6x6 and 7x7. Larger boards with more colours need more planning. You can switch difficulty at any time.
What if I connect something wrong?
Click an endpoint to clear that colour's entire line so you can redraw it, or use Undo (Z) to step back one move.