Summary

I didn't see any siphon that fit my application, so I designed my own. This is used to repeatedly siphon a tank of water from full to empty for aquaponics gardening. The thread diameter is 1.050" which fits nicely into a hole cut by a 1-1/8" hole saw. Largest diameter is 2.10". Overall height is 8.022", so it should fit on most printers. Water height is 6.7". It siphons smoothly and quickly, just make sure the inlet holes on the bottom do not become interrupted.

Printed with PETG, no supports, on a SnapMaker 2.0
You will need to sand the outer and inner threads slightly with 220 grit sandpaper or finer for a snug fit.