Alchemy Factory Priority Splitter Guide

Evidence status: Verified from supplied long-form player footage. Checked 2026-09-11. Exact numeric recipes may change with patches.

Use priority routing to protect critical machines and send only true surplus downstream.

Quick answer

Build the smallest working version first, confirm that inputs stay supplied and outputs keep moving, then scale. Alchemy Factory rewards visible, modular logistics more than clever but fragile spaghetti routing.

The core rule

Feed the machine that keeps the chain alive first; route extra output second. This is especially valuable for support materials used both to sustain themselves and feed the rest of the factory.

Why it prevents cascades

When a support machine starves, every downstream consumer can stop. Priority routing keeps the upstream loop alive during temporary shortages.

Use visible overflow

Send the non-priority branch to storage or a clearly visible belt so you can tell when the factory actually has surplus.

Do not over-prioritize

Too many priority rules can hide a weak upstream supply. If the overflow is always empty, increase production instead of adding more routing tricks.

Troubleshooting checklist

1. Confirm the current patch and unlock state.
2. Inspect the upstream input before rebuilding the output side.
3. Check for full storage, blocked belts, or an empty support resource.
4. Test one module in isolation.
5. Scale only after the isolated module stays stable.

Source used

• Gold, Fuel, and Fertilizer Logistics Guide (With Full Walkthrough) — supplied transcript with timestamps.