Quick answer: Use terrain and sealed channels early, move underground Water upward as Steam after you unlock the Flamethrower, and switch to a Pump–Pipe–Liquid Vent line after unlocking Fluids. If a connected Pump stops, check inside it for solid pixels before rebuilding the route.
What Water is for
Water is an input, a transport problem, and a factory hazard at the same time. It combines with Sand to create Wet Sand for the first refining line, and it turns Seeds into Wet Seeds for later plant production. A line that receives Water in bursts will starve its machines, while an uncontrolled source can flood spaces that were meant for solid materials.
When the Wet Seed supply is stable, continue with the Planter Box Guide instead of mixing the plant-growth step into the Water reservoir.
The practical goal is not to move the largest possible pool. It is to deliver a steady flow to one visible mixing point and give excess Water somewhere safe to settle.
Choose a transport method by progression
| Progress stage | Best method | Use it when | Main risk |
|---|---|---|---|
| Early | Gravity and sealed channels | The source is above or beside production | Corner leaks and uncontrolled flooding |
| After Flamethrower | Steam and rain | Water is deep below the factory | Steam collects under a ceiling or rains in the wrong place |
| After Fluids | Pump, Pipe, and Liquid Vent | You need a fixed point-to-point supply | Solid pixels block the Pump intake |
Gravity: keep the route observable
Shape a shallow channel from the source to a small collection basin. Use Blocks or other verified liquid-blocking structures for the sides and floor, and close diagonal corner gaps. Water cannot pass directly through a solid barrier, but it can slip through the meeting point of two unsealed corners.
Conveyor Belts block Water, while Advanced Filters can change how liquids pass. Keep liquid away from the solid-material side of a Filter unless the mixing is deliberate. A shared Filter can change Sand or Seeds while they are passing through and leave the result stuck inside the sorter.
Steam: move Water upward before Pipes
Heating Water with the Flamethrower creates Steam. Steam rises, spreads beneath a ceiling, and returns as Water when it reaches the sky. Build an open vertical route and use Blocks to guide where the rain falls. A roof or narrow overhang can trap the Steam before it reaches open sky.
This method is useful for lifting a deep source, but it is less precise than a Pipe network. Test with a small amount first so the rain does not land across belts, Filters, or electrical infrastructure.
Pumps and Pipes: deliver Water to one point
The official Research table currently lists Fluids at 1,250 Gold, unlocking the Pipe, Pump, and Liquid Vent. A Pump sends a non-Lava liquid through connected Pipes to a Liquid Vent. Multiple liquid types entering one connected network can mix, so dedicate the line to Water.
The Pump is not a sealed liquid-only tile. Solid pixels can enter it and occupy the intake. The actual pickup area is the central 2×2 pixels of the 4×4 tile, so a thin layer of debris can stop the system even when Water is visibly touching the building.
Build a reliable Water line
- Choose the mixing point first. Put the Water outlet where you can see Sand or Seeds enter and the wet result leave.
- Prepare overflow space. Give excess Water a depression to settle into instead of letting it run into another production channel.
- Separate solids from the intake. Do not place a Pump at the bottom of a mixed-material chute.
- Connect the shortest test route. Use one Pump, a short Pipe run, and one Liquid Vent before extending the network.
- Release a small source. Confirm that the Pump consumes Water and that the Vent deposits it at the intended end.
- Watch a complete production cycle. The line is stable only when the wet material also has a clear path into the next machine.
For Wet Sand production, continue with the Processing Plant Guide. Keep the resulting solid-material route separate and use the Automation Guide for its belts and Filters.
Troubleshoot Water problems
The Pump is connected but nothing comes out
Hover the Grabber over the Pump and look for material other than Water. Remove any solid pixels from the intake, then verify that Water reaches the center of the Pump rather than only touching an outer edge.
Water disappears before reaching the factory
Loose droplets that do not find a depression eventually evaporate; the current official Water page gives the timer as about 45 seconds. Make the channel continuous, reduce long flat stretches, and add a basin at the destination. Treat that timing as Early Access behavior rather than a permanent constant.
Water leaks through a wall
Inspect diagonal joins. Two blocks that touch only at their corners can leave a path for liquid. Add a third block across the corner instead of thickening an unrelated section of the wall.
Water passes through a machine unexpectedly
Not every building is liquid-tight. The official Water page lists Blocks, Conveyor Belts, Kinetic Presses, and Flux Emanators as Water blockers, while Advanced Filters can alter liquid flow. Test an unfamiliar tile before using it as a reservoir wall.
Water reaches Lava
Water landing on Lava becomes Steam, but the current Lava page says the reaction does not reduce the amount of Lava. Keep the two networks apart unless that reaction is intentional. For safe Lava transport and burner construction, use the Lava Guide.
About infinite Water
The current official Water page describes an automatic loop: a Cryoblaster produces Snow, heating the Snow creates Steam, and the Steam returns as rain. The page says this can create infinite Water. Treat the loop as patch-sensitive Early Access behavior, isolate it from the main factory, and confirm that the rain lands in a contained basin before scaling it.
Verified sources
Facts on this page were checked on August 17, 2026 against:
- Official Water page
- Official Pump page
- Official Steam page
- Official Research table
- Official Lava page
Sandustry is in Early Access. Recheck the official pages after major patches, especially for research costs, interaction rules, and timing values.