All three perform identically below the lid. The shape is chosen to fit the finish around it.
Octagon, Round, and Square catch basin bodies share the same internals and hygienic standard — the shape is chosen to match what's finishing the floor around it, so the transition sits clean.
Polyurethane or HygieniCrete floor — Octagon is our Signature Series profile
Polished concrete floor — Round sits cleanest in a circular finish
Tiled floor — Square lines up naturally with grout lines
Not sure yet — tell us the floor finish and we'll match it
None of the three shapes outperforms the others on drainage or cleanability. Pick based on what the floor around it looks like, and we'll confirm the fit before it ships.
Coating, polished concrete, or tile — send us the finish and we'll confirm the shape that fits cleanest.