It's not a thing. And people claiming it was then have to address why the Medievals, who had their own aqueducts with lead piping, weren't affected. More can always be said regarding this matter; for the meantime, here's some previous posts to consider:

• u/Talleyrayand addresses Roman lead pipes and the position that they lead to the fall of the Empire (pun very much intended);
• and u/eternalkerri on some of the physical factors re lead pipes;
• and u/XenophonTheAthenian here quotes Vitruvius and Frontinus on matters of lead.