Low flow shower heads presentation complete
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Low-Flow Shower Heads
1.6 GPM or less
Cassandra Mill & Timothy Davidson
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How many gallons of water do you use for showering in a year?
How many times a week do you shower?
How many minutes do you shower for?
What is the flow rate of your shower head?
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Back of the Envelope Calculation
Assumptions: The average American showers for 8 minutes
a day, five days a week.
The average shower head has a flow rate of 5 gallons per minute (gpm).
There are 52 weeks in a year.
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Calculating your personal shower water consumption
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Calculating your personal shower water consumption
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Low –Flow Shower Heads in 2010
Low Flow Shower Heads have improved incredibly in recent years
Driving forces behind L-F Shower Heads
Government Regulations and Programs
Environmental Impacts
Advancements in technology
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Energy Policy Act
Passed by Congress in 1992
Established production standards for water efficiency
Legally set national standard for shower heads’ flow rate at 2.5 gpm (previous average 5-8 gpm)
Met with public disapproval
Many manufacturers circumvented new standards by putting directions on packaging for removing washer that restricted flow rate
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EPA’s WaterSense Program
Launched in 2006 to encourage consumer awareness about water
efficient products
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EPA’s WaterSense Program
The EPA works with an independent third party to classify home products that meet water efficiency criteria
The WaterSense label appears on low-flow shower heads starting in 2010
*It is important to note that WaterSense considers a flow rate of 2.0 gpm or less to be “low-flow”
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ImpactsIn the US we consume
approximately 340 billion gallons everyday
Showers account for about 18% of home water use
Let’s consider how much water you can save using a 1.6 gpm low-flow shower head…
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BOE: Water Savings with a 1.6 GPM shower head
The amount of water that could be conserved nation wide in one year would fill more than 3 million Olympic swimming pools!
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Technology Showerhead Flow Restrictors Primitive, early low-flow technology
Work by limiting water passing through unit
Seen in older fixtures
High customer
rejection rate
Not Advised
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TechnologyAeration
In a shower-head, aeration works by mixing air into the water stream
Increases the volume of water
Less water can be used to wet the same area
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TechnologyPressure Compensating Flow Regulator
Works through the expanding and retracting of a specific O-ring against a precision profile
Allows flow rate to be
maintained over variety of
pressure ranges
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ProductsQuality models start around $25
Alsons Water Amplifying
Delta Transitional
$60
Evolve RoadRunner
$40
$26
$25
Bricor EcoFIT
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ProductsWhat to look for in a L-F Shower
Head
Clearly marked maximum GPMWaterSense certification logo No removable flow restrictor Features such as
Aeration A pressure compensating flow regulator On-Off Switches and “SmartStart”
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ProductsWaterSense Certification
WaterSense Tests:
Water efficiency
Spray coverage
Spray force
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Do-It-Yourself ResourcesTesting your shower head flow
rate
WaterSense Product Search
How-To’s (installing shower heads…)
Energy Cost Calculator
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Start Small…“A crucial part of the path to water conservation
involves paying close attention to the dimensions and scales that define how people interact with and understand water.”
– Helen Ingram, UC Irvine