A friend wanted a right angle filter cap to create a jet going around the pool rather than into the middle. It's one of those 15 foot above ground circle pools made by Intex.

Print with a custom support on the indented rim, unless you have a good fan. If you don't you'll need to file down the rim a bit.

I also did a right angle connector in case you want to use the original filter cap.

If it's too big/small scale it up/down 1 or 2%.