The host fittings in the model are for 5/8" ID. I was far along before I caught that fact…
These are ½" fittings for 1" PVC.
I will include the Undocumented SCAD files I hacked together incase you need to make a modification smaller or bigger.
I used the external Barb so I did not print the internal barb.
The author remixed this model.
The host fittings in the model are for 5/8" ID. These are ½" hose ID fittings (¾" OD).