<Li> Emergency showers, installed in laboratories and other facilities that use hazardous chemicals, are required by law in the United States; designed to deluge continuously at around 30--60 US gallons (110--230 l) per minute for at least 15 minutes and should be located at most 10 seconds away from potential users . </Li> <Li> Mixer shower, a shower system that takes water from existing hot and cold water supplies and combines them within the unit . </Li> <Li> Navy shower, a method of showering that allows for significant conservation of water and energy </Li> <Li> Power shower, a shower stall device that works similarly to a mixer shower by mixing existing hot and cold water feeds, but locally increases the water pressure available to the shower head by means of an electric booster pump . </Li>

When did showers become common in american homes