[2.1.14] Pumpjack with fluid input requires uranium-mining
Posted: Sat Aug 08, 2026 11:24 pm
Hello,
I found what appears to be a possible bug in Factorio 2.1.14 (build 87180, win64, steam, space-age)
When a pumpjack prototype is given an input fluid box and crude oil is configured with a required input fluid, Factorio reports that uranium-mining must be researched before the pumpjack can be placed.
The required input fluid in this test case is water. No uranium-related prototype or technology is used.
Reproduction steps:
1. Start Factorio with only the base game and the attached test mod enabled.
2. Start a new game.
3. The test mod changes the crude-oil resource as follows:
- required_fluid = "water"
- fluid_amount = 10
4. The test mod adds an input_fluid_box for the pumpjack.
5. Attempt to place the pumpjack on a crude-oil field.
Actual result:
The game displays a message stating that uranium-mining must be researched before the pumpjack can be placed.
Expected result:
The pumpjack should be placeable on crude oil without requiring uranium-mining. The pumpjack should only require its normal technology, and the input fluid should be supplied through the added fluid connection.
The test mod does not modify uranium, uranium-mining, or any other uranium-related prototype.
Attached files:
- Minimal reproduction mod: hc-required-fluid-test.zip
- Screenshot of the placement message
System:
- Operating system: Windows
- Factorio version: 2.1.14
- Mods enabled: base and hc-required-fluid-test only
Please let me know if additional diagnostic information is required.
I found what appears to be a possible bug in Factorio 2.1.14 (build 87180, win64, steam, space-age)
When a pumpjack prototype is given an input fluid box and crude oil is configured with a required input fluid, Factorio reports that uranium-mining must be researched before the pumpjack can be placed.
The required input fluid in this test case is water. No uranium-related prototype or technology is used.
Reproduction steps:
1. Start Factorio with only the base game and the attached test mod enabled.
2. Start a new game.
3. The test mod changes the crude-oil resource as follows:
- required_fluid = "water"
- fluid_amount = 10
4. The test mod adds an input_fluid_box for the pumpjack.
5. Attempt to place the pumpjack on a crude-oil field.
Actual result:
The game displays a message stating that uranium-mining must be researched before the pumpjack can be placed.
Expected result:
The pumpjack should be placeable on crude oil without requiring uranium-mining. The pumpjack should only require its normal technology, and the input fluid should be supplied through the added fluid connection.
The test mod does not modify uranium, uranium-mining, or any other uranium-related prototype.
Attached files:
- Minimal reproduction mod: hc-required-fluid-test.zip
- Screenshot of the placement message
System:
- Operating system: Windows
- Factorio version: 2.1.14
- Mods enabled: base and hc-required-fluid-test only
Please let me know if additional diagnostic information is required.