It seems like pee would be just as efficient flowing through pipes all alone? I know some urinals are flush-free, but it just seems like they all could be that way
In: Technology
The urinal has a water trap to keep sewer gasses from entering the building through the pipes. You don’t want the urine to just sit in the trap because it will begin to smell. The flushing rinses the sides and flushes the urine out of the trap. Your sinks, showers, and toilets all have traps.
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