Consider a typical household with two adults, two children, and two bathrooms. Each person flushes an average of five times a day. That's 20 flushes total or 10 flushes per toilet. But that would be true only if the family never left the house. The parents spend much of the day at work, the kids at school. On weekends and some evenings they all go shopping and out to movies and dinner. So say that about half the time they use their own plumbing. That means their two toilets would each be flushed an average of five times a day.