Aquarium Air Manifold/Splitter

thingiverse

I used five M3x20mm screws as valves in a 5-way air manifold for aquarium air tubing. The standard 3/16 ID tubing fits snugly but securely. The screws themselves are also tightened firmly to prevent air leaks. This design allows for controlled airflow when the screws are backed out, creating a .5mm gap on each side. Backing them out 2mm or more increases air flow, with more movement resulting in greater airflow.