In present times most residents of the United Kingdom take properly working plumbing systems for granted. Most do not take the time to think about the history of plumbing or the way plumbing technology has evolved over time. Plumbing has a long and interesting history: a history that is worth exploring.It was during the Greek and Roman empires that plumbing technology first started to evolve. Basic plumbing systems were invented and installed during these empires’ rule to make it easier to carry water to and from the public bathing houses that were so popular. It was this necessity that lead to the invention of the aqueduct during the Roman Empire. The aqueduct was the primary mode of plumbing and water distribution from the Roman Empire until the 1800s. Pipes were constructed mostly from lead during ancient times and aqueducts were pieced together from stone and clay. However, this is no longer the case in modern times. Today, steel, brass, copper and plastic are the most popular building materials for plumbing and piping systems. Lead is no longer used to make pipes because the toxicity of lead is considered to be too high. The bath houses that the Romans enjoyed are considered the predecessors of plumbing as it currently exists. Originally, public bathing only occurred while the sun was up because the bath water was only replaced once each day. Remember, it was not until long after the Roman Empire fell that bacterium was discovered and the western world learned how diseases were spread with the obvious implications on bathing and personal hygiene. In Roman times, one water change each day was all they thought they needed.The modern toilet is, arguably, more important to many modern UK citizens than the aqueducts of the Roman Empire. The toilet that most western citizens are familiar with in today’s society was first built in Mohenjo-Darco in approximately 2800 BC. This toilet consisted of a pile of bricks upon which a wooden seat was fixed. These “modern” toilets were only available to the highest members of society and, in fact, would not be used by the masses until the 1800s when the western world adopted them.As the western world adopted the plumbing and toilet structures that were invented in Roman times the technology surrounding the systems exploded in volume and size. In less than one hundred years the western world helped toilets and plumbing fixtures advance from aqueducts and sit down holes to the sophisticated and technically complex modern marvels that western people now take for granted. Today pipes and plumbing fixtures are mostly located underground and the sewage drains and cesspools of ancient times have been almost completely eradicated and replaced. As technology continues to advance, the cleanliness and efficiency of plumbing and toilets will become more efficient and clean.