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HOW LONG IS THE AVERAGE SHOWER IN YOUR HOUSEHOLD?
Think about how people in your household shower and determine an average shower length. Then choose the interval that best reflects how your household uses the shower.
DO YOU HAVE LOW-FLOW SHOWERHEADS?
Low-flow showerheads flow at 2.5 gallons per minute (gpm) (some go as low as 1.5 gpm). Older, less-efficient showerheads use as much as 5.0 gpm.