u/Kung-Fu-Brew5253

So we’ve got a new brewer starting here who’s coming from a larger brewery (10,000bbls a year) and we make about 1,500 bbls. At his old job they would purge all FV’s before filling, I have never done this and from what I can tell it’s never been an issue? We almost exclusively use dry yeast (brick squad) but it has me asking the question, which method is correct?