The first "indoor" plumbing credit goes to the Romans, how ever primitive it may have been. They first invented the aqueducts that carried water from the mountains and hills surrounding Rome, and were famous for the "Roman Baths".
The first indoor bathtub was introduced in 1870. It was in Seattle, Washington. John Michael Kohler later made the first tub specifically for indoor bathing in 1883. He did this by applying enamel to a horse through. His company later started making indoor toilets, sinks, and other plumbing. Kohler is still a popular name in indoor plumbing to this day.
What is 'following'.
I was born Mar 31. 1929. In a small town in IL. We always had indoor plumbing. The Aztec's had indoor plumbing.
Johnathan R. Plumber
It’s indoor plumbing
Indoor plumbing was invented long before World War 2. According to the related link below, "The first patent for the flushing toilet was issued to Alexander Cummings in 1775." but "Until 1840, indoor plumbing could be found only in the homes of the rich and the better hotels." World War 2 did not begin until 1939.
The ancient Egyptians had flush toilets. The ancient Romans had indoor plumbing.
About 2,000 years ago the Romans started using indoor plumbing.
yes they have it
Indoor Plumbing
Check out ancient Rome or Greek plumbing history