Re: antique kitchen sink
Typically, the dishwasher is fastened to the underside of the countertop by means of two metal tabs fastened with screws. These tabs are visible when you open the door; look up at the underside of the countertop and you'll see them.
Without being properly fastened, the dishwasher is unstable and can tip forward when the door is opened.
You may find that you have to be creative in order to properly secure the dishwasher under the metal sink unit. Also, consider that you'll have to have a cupboard or panel on the sink side of the dishwasher, as undercounter dishwashers don't have their own cabinets.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.