Stainless Steel Mop Sink Cabinet - 25 1/4" x 22 5/8" x 84"

We installed this mop sink in January 2024 and by August 2024 is has rust and corrosion all over it. The walls are supposed to be 304 stainless (medium grade) and the sink and door 430 grade (low grade). The sink, door, and hinges have the worst rust. The sides and top have less rust. The location is in Fort Myers, FL 10+ miles from the ocean so its not salty air causing this. We have 304 stainless throughout the property in other locations with little to no rust that are much older. I suspect that metal may not be the grade that is advertised. I spoke with Webstaurant who said 90 day warranty only. There is a version of this sink that is all "300 grade" stainless. Not sure what that means, I would assume 304 grade. Almost double the price. I wouldn't trust even that one since the 304 on the sides and top are also rusting and corroding. Other than the metal issues, its a great mop sink and well designed. We will be building our own mop sink out of composite lumber and getting a non-metalic sink for the floor that will not rust or corrode. I expect we will get 1-3 more years out of this sink before its too unsightly to keep.