4 inch adapter for solar pool cover for swimline reels

thingiverse

I required a custom fitting to connect 4-inch tubing to my pool reels for the solar pool cover installation. The reels had been calibrated for 3-inch tubing, so I needed an adapter that would provide a snug fit. To manufacture it, I used a 3D printer with a standard resolution and printed the design using 40% infill with four shells of ABS plastic.