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Summary: Watch as an expert plumber discusses shower head regulations in this free online video about shower head installation.
David Foster has worked in the plumbing field for the past five years. His specialty is home plumbing fixtures.read more
"Achieve water savings of 25 to 60%. For maximum water efficiency, select a shower head with a flow rate of less than 2.5 gallons per minute. There are two types of low flow shower heads; aerating and non-aerating. Aerating shower head mix air with water forming a misty spray. As you can see with aerating shower head, it maintains a steady pressure so that the flow has even full shower spray. Because air is mixed in with the water, the water temperature can cool down a bit towards the floor of the shower. Aerating shower heads are the most popular type of low flow shower heads. As you can see in the illustration, mixed in through the front of the shower head which is self pressurizing. Oxygen is introduced and the water is introduced with the air and increasing the oxygen content by up to 10 times."
eHow Article: Shower Head Regulations