Funnel with air vent
thingiverse
This funnel features an integrated air vent that significantly improves water flow compared to other funnels I've used at home. Its larger outer diameter and built-in air vent piping make it a breeze to use. A special air vent pipe is included, making it easy to fill the funnel even when the hole is completely sealed. The outside diameter of the bottom part measures 27.5mm.
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