Plumbing Trivia Questions

Tap a choice for the answer and its reason, from the clay pipes of Nippur to the ceramic disc tap.

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After the fall of Rome, water supply and sanitation stagnated or went backward for well over how long?

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Unofficial practice questions, not affiliated with any school, exam board or quiz show. Bank checked October 3, 2026.

How it works

These plumbing trivia questions cover the history, the materials and the words of the trade in four rounds, from wells dug around 8500 BCE to the ceramic disc tap.

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Trivia questions for plumbers and everyone else

Wells, clay pipes and the ancient world runs from Mesopotamia to the island of Kilwa. Lead, wood, iron and plastic is the materials round: hollowed logs, galvanized iron, PVC and PEX. Waterworks and sewers follows London, Paris, Hamburg and Chicago. Taps, traps and toilets has the S-bend, the mixer tap and the queen who was given a flush toilet.

History and words, not a repair guide

Nothing here is repair, installation or code advice. Tap a choice to check it; the reason and the article it was read in appear with the answer.

Tips
  • Lead, wood, iron and plastic suits a trade crowd: schedule, soil pipe and soldered fittings come up there.

Questions and answers

What are some easy plumbing trivia questions?

Which metal is plumbing named after? What does a mixer tap combine? What is the most common American word for a tap? The answers are lead, hot and cold water, and faucet.

Where does the word plumbing come from?

From plumbum, the Latin word for lead. The first effective pipes of the Roman era were lead pipes, and the use was so common that the trade took its name from the metal.

Who invented the flush toilet?

Sir John Harington invented one in the 16th century for Queen Elizabeth I, his godmother. The modern form began to emerge in the late 18th century; Alexander Cumming patented one with an S-bend pipe in 1775.

How were the answers checked?

Each was read on October 3, 2026 in the English Wikipedia article the question links: Plumbing, History of water supply and sanitation, or Tap (valve). Company names and the articles' sections on epidemics and bacteria are left out.

All 52 questions with answers

Wells, clay pipes and the ancient world 12

  • A copper waste pipe joined which pyramid to its temple complex at Abusir? Answer: The Pyramid of Sahure. Source: Wikipedia: Plumbing
  • After the fall of Rome, water supply and sanitation stagnated or went backward for well over how long? Answer: 1,000 years. Source: Wikipedia: Plumbing
  • Around the 15th century the wealthy had indoor plumbing in stone homes on which East African island? Answer: Kilwa. Source: Wikipedia: Plumbing
  • The earliest clay sewer pipes were found at Eshnunna and in the Temple of Bel in which city? Answer: Nippur. Source: Wikipedia: Plumbing
  • In Spain and Spanish America, what is a watercourse run by its community called? Answer: An acequia. Source: Wikipedia: History of water supply and sanitation
  • Pipes of which metal appeared in Egypt by 2400 BCE? Answer: Copper. Source: Wikipedia: Plumbing
  • The standardized pipes of the Indus Valley civilization used which material to stop leaks? Answer: Asphalt. Source: Wikipedia: Plumbing
  • Wells dug around 8500 BCE have been found on which Mediterranean island? Answer: Cyprus. Source: Wikipedia: History of water supply and sanitation
  • What is the Nazca system of linked wells and an underground watercourse in Peru called? Answer: Puquios. Source: Wikipedia: History of water supply and sanitation
  • Which city has the oldest known latrines built of brick? Answer: Uruk. Source: Wikipedia: Plumbing
  • Which people introduced clay sewer pipes around 4000 BCE? Answer: The Mesopotamians. Source: Wikipedia: Plumbing
  • The word plumbing comes from plumbum, the Latin word for which metal? Answer: Lead. Source: Wikipedia: Plumbing

Lead, wood, iron and plastic 11

  • By which decade had most cities in the United States moved away from lead pipes for water supply? Answer: The 1920s. Source: Wikipedia: Plumbing
  • From the late 1700s through the 1800s, cities in the United States made water pipes out of which hollowed natural material? Answer: Logs. Source: Wikipedia: Plumbing
  • In the trade, waste piping is also known by which name? Answer: Soil. Source: Wikipedia: Plumbing
  • In the tubing called PEX-Al-PEX, which metal is sandwiched between the layers of plastic? Answer: Aluminum. Source: Wikipedia: Plumbing
  • In which two centuries were wooden pipes used in London? Answer: The 16th and 17th. Source: Wikipedia: Plumbing
  • In which year did PVC become practical to manufacture, once a way to plasticize it had been developed? Answer: 1926. Source: Wikipedia: Plumbing
  • PEX is short for which plastic? Answer: Cross-linked polyethylene. Source: Wikipedia: Plumbing
  • Soft copper pipe was first joined with flared fittings. How was the rigid copper tubing that followed it joined? Answer: With soldered fittings. Source: Wikipedia: Plumbing
  • The wall thickness of a pipe increases with which number, such as 20, 40 or 80? Answer: Its schedule. Source: Wikipedia: Plumbing
  • What do the letters PVC stand for? Answer: Polyvinyl chloride. Source: Wikipedia: Plumbing
  • Which piping was commonplace for drinking water in the United States from the late 1800s until around 1960? Answer: Galvanized iron. Source: Wikipedia: Plumbing

Waterworks and sewers 15

  • A statute of 1272 set rules for septic tanks and drains in Dubrovnik. By which name was the city then known? Answer: Ragusa. Source: Wikipedia: History of water supply and sanitation
  • Between which years were the intercepting sewers of London built? Answer: 1859 and 1865. Source: Wikipedia: History of water supply and sanitation
  • Donald Cameron patented a tank in 1895 and called it a septic tank. Of which English city was he the surveyor? Answer: Exeter. Source: Wikipedia: History of water supply and sanitation
  • The first continuous use of chlorine to disinfect water in the United States, in 1908, was at a reservoir that supplied which city? Answer: Jersey City. Source: Wikipedia: History of water supply and sanitation
  • The first documented use of sand filters to purify a water supply was in 1804, in which Scottish town? Answer: Paisley. Source: Wikipedia: History of water supply and sanitation
  • The first sewer systems in the United States were built in the late 1850s in Brooklyn and which other city? Answer: Chicago. Source: Wikipedia: History of water supply and sanitation
  • In medieval Paris, what were streets sometimes called when wastewater ran down the middle of them? Answer: Split streets. Source: Wikipedia: History of water supply and sanitation
  • In the Middle Ages, what were the workers called who emptied cesspools? Answer: Rakers. Source: Wikipedia: History of water supply and sanitation
  • In the name septic tank, what does septic mean? Answer: Bacterial. Source: Wikipedia: History of water supply and sanitation
  • In which city was the first treated public water supply in the world installed, in 1829? Answer: London. Source: Wikipedia: History of water supply and sanitation
  • In which English town was the first civic system of piped water set up, in 1692? Answer: Derby. Source: Wikipedia: History of water supply and sanitation
  • In which German city was the first comprehensive sewer system in the country built, in the mid-19th century? Answer: Hamburg. Source: Wikipedia: History of water supply and sanitation
  • What is the summer of 1858 in London called, when the smell of the River Thames became overpowering? Answer: The Great Stink. Source: Wikipedia: History of water supply and sanitation
  • Which canal did Napoleon build in 1802 to bring water to Paris? Answer: The Ourcq canal. Source: Wikipedia: History of water supply and sanitation
  • Which Scottish engineer surveyed Liverpool and put his plan for its sewers to the Corporation in April 1848? Answer: James Newlands. Source: Wikipedia: History of water supply and sanitation

Taps, traps and toilets 14

  • A quarter-turn tap can be told by its range of motion between fully open and closed. How many degrees is it? Answer: 90. Source: Wikipedia: Tap (valve)
  • A removable tap handle with a square socket is called a loose key, a water key or which other name? Answer: A sillcock key. Source: Wikipedia: Tap (valve)
  • Disc taps rely on the very low friction between two surfaces of which material? Answer: Ceramic. Source: Wikipedia: Tap (valve)
  • The first screw-down tap mechanism was patented in 1845 by brass founders of which English town? Answer: Rotherham. Source: Wikipedia: Tap (valve)
  • In 1868 Maughan of London developed the first instantaneous, gas-powered home version of which appliance? Answer: A water heater. Source: Wikipedia: History of water supply and sanitation
  • In engineering, what is the traditional screw-down tap called? Answer: A globe valve. Source: Wikipedia: Tap (valve)
  • In the 16th century Sir John Harington invented a flush toilet for which queen, his godmother? Answer: Elizabeth I. Source: Wikipedia: History of water supply and sanitation
  • The S-bend became known as the U-bend after whose U-shaped trap of 1880? Answer: Thomas Crapper. Source: Wikipedia: History of water supply and sanitation
  • Thomas Campbell patented the mixer tap in 1880. In which Canadian city did he live? Answer: Saint John, New Brunswick. Source: Wikipedia: Tap (valve)
  • Water closet is another name for which fixture? Answer: A toilet. Source: Wikipedia: Plumbing
  • What do plumbers call an installation where the usual positions of hot and cold have been ignored? Answer: Crossed connections. Source: Wikipedia: Tap (valve)
  • What does a mixer tap combine? Answer: Hot and cold water. Source: Wikipedia: History of water supply and sanitation
  • Which word is the most common term in the United States for what British English calls a tap? Answer: Faucet. Source: Wikipedia: Tap (valve)
  • Who patented a flush toilet with an S-bend pipe in 1775? Answer: Alexander Cumming. Source: Wikipedia: History of water supply and sanitation
How this list was compiled

Written for this site; nothing was copied from another list. Questions and wrong choices are our own. Each explanation restates, in our own sentences, a fact from the English Wikipedia article named and linked beside the question (https://en.wikipedia.org, text under the Creative Commons Attribution-ShareAlike 4.0 license): Plumbing, History of water supply and sanitation and Tap (valve). The text of each article was fetched on October 2, 2026, and on October 3, 2026 the passage that states each fact was read in it before the question was kept. Left out on purpose: anything that reads as repair, installation or plumbing-code advice, company names, and the health sections of the articles (epidemics, bacteria, fluoride). Levels are our estimate: easy is fair for any table, medium suits people who know the subject, hard will stump most tables. Each question also carries the date its article was read (checkedOn). Licence: own work