This is a simple inlet screen that fits over 1" PVC pipe. Printed in PETG. Not yet tested for flow rate, but it was designed to go in the overflow of a reef-ready tank to keep snails out of the drain pipes.

eSUN PETG: 40mm/s, 0.2mm layers, 95% extrusion, at 240/80c (First layer: 20mm/s, 0.4mm, 200%, 245/85c)

Files if you'd like to print your own: Thingiverse