Small Hookah 1-way Valve

thingiverse

Here's a mini one-way hookah hose adapter that employs an 8mm ball bearing held firmly in place by gravity. This design proves effective as a purge valve due to its low profile, making it a great option for various setups. When working with different materials, consider scaling up the adapter by 1% or 2% to ensure a snug fit without needing a grommet.