I’ve seen hundreds of washing machines and laundry tubs use a makeshift “stand pipe” to divert the water to a basement floor drain. But I’ve never seen a dishwasher use the same method. For some reason, this is a DLR (Doesn’t Look Right).
I would not think this would be a sanitary method of draining the dishwater. What would others recommend in this case? Maintenance Repair or a Defect and call in a plumber? There isn’t a Wye connector at the base of the piping, either, but maybe the Tee connector will slow down the flow enough that it won’t spill all over the floor.