If i have a meat rack in a sink and use hot water to clean a pareve pot, and place the pot directly on the rack, does the pot now become meat?
Answer:
Provided the rack was clean, the pot does not become meaty. Even if the rack was used recently, this is a case of nat bar nat (de-heteira), and the pot remains pareve.
See Iggros Moshe (Yoreh De'ah 2:28; 3:11) concerning the use of dishwashers for meaty and dairy dishes.