Why Are U-bends Used in Plumbing?
U-bend pipes are installed under sinks and toilets to provide a water seal against the outside sewer pipes. The U-bend retains a permanent p
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Toilets
How Do Astronauts Bathe in Space?
How Do Astronauts Bathe in Space? Astronauts in space bathe in a very complicated manner. The space station has a full body shower unit. Whe