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Global Health: Science and Practice

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INNOVATION
Open Access

Handwashing With a Water-Efficient Tap and Low-Cost Foaming Soap: The Povu Poa “Cool Foam” System in Kenya

Jaynie Whinnery, Gauthami Penakalapati, Rachel Steinacher, Noel Wilson, Clair Null and Amy J Pickering
Global Health: Science and Practice June 2016, 4(2):336-341; https://doi.org/10.9745/GHSP-D-16-00022
Jaynie Whinnery
aInnovations for Poverty Action, Kenya, Kisumu, Kenya
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Gauthami Penakalapati
aInnovations for Poverty Action, Kenya, Kisumu, Kenya
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Rachel Steinacher
aInnovations for Poverty Action, Kenya, Kisumu, Kenya
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Noel Wilson
bCatapult Design, San Francisco, CA, USA
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Clair Null
aInnovations for Poverty Action, Kenya, Kisumu, Kenya
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Amy J Pickering
cStanford University, Stanford Center for Innovation in Global Health, Stanford, CA, USA
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Figures & Tables

Figures

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  • FIGURE 1
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    FIGURE 1

    Conventional Handwashing Stations in Kenya

  • FIGURE 2
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    FIGURE 2

    Configurations of the Povu Poa Handwashing System

    (A) bucket model design; (B) pipe model design.

  • FIGURE 3
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    FIGURE 3

    Water‐ and Soap‐Dispensing Elements of the Povu Poa Handwashing System

    (A) Users can operate the Povu Poa Swing Tap hygienically with the back of their hand. The swing tap dispenses water from up to 3 holes; users can control the amount and flow of water coming from these holes based on how far forward or backward they pull/push the tap. (B) The Povu Poa Soap Foamer creates foam by mixing soapy water and air.

  • FIGURE 4
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    FIGURE 4

    Potential Adaptations to the Povu Poa Handwashing System

Tables

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    TABLE Water and Soap Efficiency for the Povu Poa Handwashing Prototypes Compared With Other Handwashing Devices
    Soap TypeWater Quantity per Use (mL)No. of Uses per 5 L of WaterNo. of Uses per US$1 Spent on WaterAmount of Soap per Use (g)No. of Uses per US$1 Spent on SoapCost in US$ for Soap and Water per 100 Uses
    Povu Poa pipe modelSoapy water made with Omo brand powdered soap357141,0640.0314,865$0.10
    Povu Poa bucket modelSoapy water made with Omo brand powdered soap333151,1400.0315,696$0.09
    Dual tippy tapSoapy water made with Omo brand powdered soap62586080.96500$0.37
    Jug and basinMultipurpose bar soap (Toyo brand)513107410.491,600$0.20
    Sink with metal tapMultipurpose bar soap (Toyo brand)1,42942660.711,100$0.47
    20 L barrel with metal tapLocally made liquid soap69075511.90800$0.30
    20 L barrel with plastic tapLocally made liquid soap1,00053802.85550$0.44
    15 L bucket with plastic tapMultipurpose bar soap (Toyo brand)83364560.89900$0.33
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Global Health: Science and Practice: 4 (2)
Global Health: Science and Practice
Vol. 4, No. 2
June 20, 2016
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Handwashing With a Water-Efficient Tap and Low-Cost Foaming Soap: The Povu Poa “Cool Foam” System in Kenya
Jaynie Whinnery, Gauthami Penakalapati, Rachel Steinacher, Noel Wilson, Clair Null, Amy J Pickering
Global Health: Science and Practice Jun 2016, 4 (2) 336-341; DOI: 10.9745/GHSP-D-16-00022

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Handwashing With a Water-Efficient Tap and Low-Cost Foaming Soap: The Povu Poa “Cool Foam” System in Kenya
Jaynie Whinnery, Gauthami Penakalapati, Rachel Steinacher, Noel Wilson, Clair Null, Amy J Pickering
Global Health: Science and Practice Jun 2016, 4 (2) 336-341; DOI: 10.9745/GHSP-D-16-00022
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  • Article
    • BACKGROUND
    • INNOVATION PROCESS
    • KEY PRODUCT FEATURES OF THE POVU POA HANDWASHING SYSTEM
    • SOAP AND WATER EFFICIENCY TESTING
    • CURRENT AND FUTURE WORK
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