Schrader – Schrader valve adapter (remix, FreeCAD)

I've got a small pressure cylinder that can be filled via a standard Schrader valve with compressed air. Max. pressure is about 10 bar – but my pump head tends to slip off before that pressure is reached.

This simple adapter adds a round tube (no thread) to the valve, so the pump head gets a better hold.

Printed in PETG, 0.4 mm nozzle, 0.15 mm layer height, no infill just many perimeters, brim, no support.