I am replacing the rusted out plumbing (drain, p trap, tee, trap adapters, 45 degree elbow) under my kitchen sink with ABS, but I notice that some fittings offer a choice of hub or spigot connections.
There are a couple of places (particularly an elbow and adapter connection) where I can arrange the connections so the water will flow from a hub into a spigot, or a spigot into a hub. But I don't know if one way is better than the other.
I tried searching "abs spigot hub flow direction", but the only relevant result (among many, many irrelevant Home Depot links) was for PVC, which indicated flow from the spigot to bell (hub) would encounter a square edge that had a marginal effect on hydraulics. But looking at the ABS connections, it seems the opposite - the square edge is encountered when going from hub to spigot.
But I am more concerned with drain pipes and which orientation will be less likely to trap waste from the garbage disposal and other small bits that typically goes down the drain of a kitchen sink.
Is there any preferred or conventional way of arranging ABS spigot/hub connections with respect to the flow of waste water?