If you're curious about how airplane lavatories work, you may have many questions. Well, we have answers - including why airplane toilets have blue water.

Other times, it can be bacteria mixing with the toilet water and forming ... can often remove stubborn blue stains. Popular ...

Consider the 140,000 times you're likely to flush a toilet over a lifetime, and it's easy to see why toilets guzzle nearly 30 percent of a home's water use. Replacing older, inefficient toilets ...