What a Mechanical Pump Does and When You Need One
A mechanical pump in Create Mod moves fluids from one place to another using rotational power from your contraption. Unlike passive fluid transfer, a pump requires a connected shaft or gear system spinning at the right speed — it actively pushes liquids upward, downward, or horizontally across distances that would otherwise be impossible.
You need a mechanical pump when you want to move lava to a furnace, transport water uphill to a farm, or fill a tank that sits far from your fluid source. Without a pump, fluids flow only downward by gravity and spread horizontally on flat ground. A pump gives you control over direction and distance.
Key Takeaways
- A mechanical pump is crafted from copper casing, a cogwheel, and a shaft, and must be powered by a spinning shaft or gear connected to a motor or hand crank.
- The pump's orientation — which direction its intake and output face — is set when you place it and determines which way fluid flows.
- Pumps move fluid one block per rotation at their default speed; faster rotation moves fluid faster but requires more rotational force.
- A pump can push fluid upward indefinitely, but the higher you push it, the more rotational power you need to maintain speed.
- Fluid pipes or tanks must connect directly to the pump's intake and output ports, or the pump will not function.
Gathering Materials and Crafting the Pump
You need three items to craft a mechanical pump: one copper casing, one cogwheel, and one shaft. Copper casing is made by placing a copper block in a stonecutter or crafting table with a crafting recipe — check your recipe book in-game for the exact layout. A cogwheel is crafted from eight wooden planks arranged in a square with a center empty space, or you can use an iron cogwheel if you have the materials. A shaft is the simplest: craft it from one stick and one iron ingot.
Once you have all three, place them in a crafting table in this pattern: copper casing in the center, cogwheel above it, and shaft below it. The result is one mechanical pump. You can craft multiple pumps at once if you have the materials.
Placing the Pump and Setting Its Direction
Before you place the pump, decide which direction you want fluid to flow. The pump's front face (the side that shows the intake port) points in the direction you are facing when you place it. Hold the pump in your hand, stand where you want it, and face the direction you want the intake to point — that is the direction the pump will pull fluid from.
Right-click to place the pump. The intake port appears as a small opening on the front face, and the output port is on the back. Fluid enters through the intake and exits through the output. If you place the pump facing the wrong direction, you can break it and place it again; there is no way to rotate it after placement without breaking it.
Connecting Power and Fluid Lines
The pump has a shaft connection point on its top or side (depending on orientation). Attach a powered shaft or gear to this point using a shaft connector or by placing gears adjacent to it. The shaft must be spinning — it can come from a water wheel, a hand crank, a motor, or any other rotational power source in Create Mod.
Connect fluid pipes or tanks to the intake and output ports. Copper pipes work well and can be placed directly against the pump's ports. If the ports are not touching a pipe or tank, the pump will spin but move no fluid. Make sure the intake pipe reaches your fluid source (a tank, a cauldron, or a fluid block) and the output pipe reaches your destination.
Adjusting Speed and Power for Different Heights
A mechanical pump at its default speed moves one block of fluid per rotation. If you need to move fluid faster, increase the rotational speed of the shaft powering it — use a gear ratio or speed controller to spin the pump shaft faster. Faster pumping moves fluid down pipes more quickly and can push it higher before losing pressure.
Pushing fluid upward costs more rotational power the higher you go. A pump pushing water up five blocks needs more force than one pushing it up one block. If your pump slows down or stops when you turn it on, your power source is not strong enough for the height. Add more power sources (another water wheel, a larger motor) or reduce the height by placing intermediate tanks and pumps.
Troubleshooting Common Pump Problems
If the pump spins but no fluid moves, check that the intake pipe actually touches a fluid source and the output pipe is connected to a tank or pipe network. Fluid will not flow if there is a gap between the pump and the pipes. Also verify the pump is facing the correct direction — the intake should point toward your source, not away from it.
If the pump slows down or stops, your power source is not delivering enough rotational force. This happens most often when pushing fluid very high or when multiple pumps share one power source. Add a second motor, increase the motor's speed setting, or place a flywheel on the shaft to store rotational energy and smooth out power delivery.
If fluid backs up in the pipes and does not move, the output tank or pipe network may be full or blocked. Check that the destination tank has space, or that the output pipes lead somewhere the fluid can go. A pump cannot push fluid into a completely full tank.
Using Multiple Pumps in a System
You can chain pumps together to move fluid across long distances or to very high elevations. Place the output of one pump into the input of another, and power both from the same shaft or separate shafts. This is useful for moving lava from deep underground to a furnace far away, or for filling a rooftop tank from a ground-level water source.
Each pump in the chain needs its own power connection or needs to be on the same spinning shaft. If pumps are on the same shaft, they all spin at the same speed. If they are on separate shafts, you can adjust each one's speed independently using gear ratios or speed controllers.
Frequently Asked Questions
Can a pump move lava as well as water?
Yes. A mechanical pump moves any fluid — water, lava, honey, or any other liquid in Create Mod. The fluid type does not change how the pump works, though lava may require more careful pipe routing to avoid damage to nearby blocks.
What happens if I spin the pump very fast?
Faster rotation moves fluid faster through the pipes. However, extremely high speeds can cause fluid to back up or overflow if the destination tank cannot accept it quickly enough. Start at moderate speed and increase gradually to find the balance between flow rate and stability.
Can I use a hand crank to power a pump?
Yes, but only for small amounts of fluid. A hand crank provides rotational power when you right-click it, but you must crank it manually. For continuous operation, use a water wheel, windmill, or motor instead.
Do I need a specific pipe type to connect to the pump?
Copper pipes are the standard choice and connect directly to the pump's ports. Fluid pipes also work. The pipe type does not affect how the pump functions, only how the fluid looks as it travels and how far the pipes can reach.
What is the maximum height a pump can push fluid?
There is no hard limit, but the higher you push, the more rotational power you need. A single pump with moderate power can push water up 10 to 15 blocks reliably. For greater heights, use multiple pumps or increase your power source significantly.