1-1/4" Female Pipe - 1-1/4" Hose barb

thingiverse

I'm emptying the hot tub with a pump and using a large plastic hose. I could have bought one of these online, but instead, I took it as a challenge to learn how to create threads in Fusion 360.\r\n\r\nIt turned out to be way easier than I thought.\r\n\r\nI printed mine in PLA at .1 layer height. To ensure the threads fit properly, you'll need to use a pretty fine layer height.