Question: Must countertops and sinks be kashered for Pesach?
Answer: While the major Kashrus organizations seem to say yes, R. Yitzchak Abadi’s view is that it is not necessary. He writes as follows:
שיש מטבח וכיורים או שולחנות... ידיחם היטב ואין צריכים הגעלה ברותחים.
Countertops, sinks, and tables… one should wash them well, and they do not require purging with hot water.
I wish to explore the basis of his ruling and how it might be justified, while presenting a general overview of the halachos of the transference non-kosher flavor into kosher food in general.