Zol's Plumbing Turn the pipes, send the water home.

The rules

• The board has coloured taps and drains, joined by a network of pipe pieces — straights, elbows and tees — all starting turned the wrong way.
• Tap a piece to rotate it 90°. Water flows through any pipes whose openings line up and connect back to a tap.
• The board is solved when every drain is lit by its colour and every pipe on the board is carrying water — nothing left dry, and no pipe dangling into a wall.
• So it's not just about reaching the drains; you have to find the arrangement that uses every piece, which is what makes the tighter boards a real puzzle.

Pick your board

• Easy — a 5×5 grid with two colours.
• Medium — 7×7, still two colours, more drains.
• Hard — a 10×10 with three colours.
• Zolified — a colour-mixing board: two colours have to meet and blend on the way to a drain that demands the mix, so the paths have to cross in exactly the right place.

A pipe that looks connected isn't, until you trace it all the way back to a tap.

Three ways to play

The Daily is one shared board. Free Play is unlimited fresh puzzles at any size. And Versus races you and a friend on the same grid — first to get the water flowing wins.

Play it

Play Zol's Plumbing in your browser — nothing to download. Creating an account is free, and new players get a 30-day preview with full access to every game in the catalogue. After the preview, a rotating set of games is free to play each day.

More to untangle: Zol's Vial, pour the colours pure, Zol's Fields, cut the grid into numbered plots, or Zol's Memory, find the matching pairs.