Valves have come a long way from their beginnings, almost 2000 years ago. Technological advancements and human knowledge have continuously allowed new and improved designs to emerge in the valve industry. Technological advancements are paired with the need for valves to be better suited for the applications as industries need enhanced valves. Historically, there are five critical eras of valve innovation, starting from 2000 years ago and leading up to the current day. We will take a trip down memory lane and cover these eras and the advancements made during them.