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I received a new shower head for Christmas this year. The Evolve low flow shower head uses only 1.5 gpm @ 85psi. I think my pressure is lower so that means it uses slightly less. My old shower head used 2.5 gpm. Since my water/sewer bill has just about doubled I think this should help to reduce the overall impact of the increase. The increase is NOT from usage it is from flat-out utility robbery. Nothing I can do about it other than conserve.
My wife and I have been using it for over two weeks now. After getting use to the lower water volume it has been very nice. You just turn on the shower and walk away. After the shower gets to temperature it shuts itself off automatically and stays that way until you plug the chain to start the flow of water.
How much could it save me. I take about a twenty-minute shower and my wife, about the same. In a week that adds up to over 250 minute of showering. Now that is equal to 250 gallons of water! (2.5 gpm-1.5gpm = 1gpm) I am figuring that is mostly hot water. (75% is a good number) The amount of hot water saved is close to 200 gallons! WOW! I had no idea. 1000 gallons a month and 50kWhrs a month. (63 degree rise of 800 gallons of water. 1 gallon = 8.33 Heat pump is about 250% efficient. 3413 BTU per kWhr)
Only time will tell if I see this in my utility bills. I would hope I could see 1000 gallons since I only use an average of 4000 a month now. I really need to replace my toilets now and see what happens.