This fitting allows you to quickly and easily connect two pieces of 710 gauge (basically 5/8ths) poly irrigation tubing. As some of you will know, 3D printing doesn't essentially guarantee a water or air-tight surface due to the pores between layers, especially if they haven't bonded perfectly.
Please note that: I've printed several different versions of this model with different parameters and consistently they all have microscopic pinhole leaks around the seams and support locations. Sealing with varnish or lacquer or annealing the print with heat can solve this problem, but honestly the leaks are so negligible that it doesn't compromise the underlying value of the part. Also apparently resin prints don't have this problem (or so I've been told).
I did the economic calculations on this beforehand so that you don't have to, and it costs about 88 cents bulk to buy the injection molded version of this fitting, but it only costs about 50 cents to print one. Hopefully some of you will find it useful.
The author marked this model as their own original creation.