Download Free 3D Model Water pipe turbine 3D Print Model

Summary
made this for a 30mm ID glass tube. Used a 3mm axle and two 3/4″ ID, 1″ OD, 1/8″ width O rings for the seals. Try printing just one stopper and scale it up and down a percentage or two to get a good fit. and I use a coat hangar wire with a small L bend at the end to extract the turbine.