And civil engineering! They had standard valves and whatnot as part of their elaborate water utility system. Unfortunately this link was the best I found. But

And civil engineering! They had standard valves and whatnot as part of their elaborate water utility system. Unfortunately this link was the best I found. But man, as not a civil engineer you could very well convince me those are early 20th century: https://www.valvemagazine.com/web-only/categories/manufacturing/4947-ancient-roman-valves.html https://www.valvemagazine.com/web-only/categories/manufactur...