What the current evidence supports
The official Sandustry page describes a factory game built around increasingly complex production chains. The official wiki describes a Filter as a block that filters an element according to its settings. The jam paths above go further only where recent player reports describe the same visible failure and a confirmed resolution.
Gold above a Kinetic Press
A recent player report shows gold preventing burnt residue from completing its fall through a Kinetic Press setup. Multiple replies identify the boundary: only burnt residue should continue through that stage, so gold needs a separate exit before the press. The player confirmed the rebuild worked after restoring that separation.
Filter conveyor versus wall mode
In a separate current factory thread, multiple players confirmed that selecting a Filter and pressing R switches its build mode between conveyor and wall. The useful check is not “press R repeatedly”; it is to read the active build-mode cue, place one test block, and confirm the intended material passes or stops.
Wet-sand and residue throughput
Current player designs repeatedly keep separate escape paths for residue and gold so those outputs do not block the wet-sand flow. That is a community pattern, not an official throughput guarantee. Use a small batch and watch the first blocked tile before copying a full blueprint.
FAQ
Should I delete the whole factory when a filter locks?
No. First reduce input and identify the oldest trapped material. A one-tile blocked exit can make the upstream system look broken even when the machines still work.
Why does gold matter around a Kinetic Press?
Recent player reports show gold can occupy the residue path and stop the fall. Separate it before the press, then verify with a small mixed batch.
How do I build the vertical filter wall?
Select the Filter and press R to change build mode. Confirm the active mode in the on-screen hotkey display before placing the final structure.
Does this tool calculate exact throughput?
No. It diagnoses visible failure paths. Exact rates require a controlled current-build test and can change during Early Access.