The first thing you need to do is examine the area and find out if there are convenient geographic deposits nearby, marked on your map with a large waterdrop symbol. If so, you can build a Water Extractor with 6 concrete and 2 machine parts. It automatically collects water until the sediment runs out. If you do not have any nearby deposits, you will have to rely on prefabricated moisture evaporators. They collect water from moisture in the atmosphere of Mars. If you start a quick game, usually you already have one vaporizer, but you will need at least one more - use cargo rockets for delivery from Earth.
All water-producing buildings must be connected to water-dependent buildings or storage facilities using pipes. They are created in the same way as cables - use the left mouse button to drag the tube from the water source to what you want to connect to. If everything is connected correctly, you will see a message that says the connection is connected. You need to make sure you connect pipes to the blue / yellow pipe symbols that appear in buildings.
