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July, 2017
Independent Water Efficiency Bulletin
Making Sense of MaP Toilet Ratings

Need to learn more about how MaP works? If you cannot get enough information on your own website, visit’s guide to toilet ratings or read this excellent overview by Ferguson Enterprises.

New Saturation Study of Remaining Non-Efficient Residential Toilets

Water-efficient toilets could potentially save up to 170 billion potable gallons of water per year in 5 states, according to new research by Koeller and Company for the Alliance for Water Efficiency and Plumbing Manufacturers International.  The “Saturation Study of Non-Efficient Water Closets in Key States” focused on Arizona, California, Colorado, Georgia and Texas and found that over 13 million aging toilets are unnecessarily wasting precious potable water in those 5 states, each of which is experiencing water supply or infrastructure issues.

MaP Testing Shower & Hot Water Survey

MaP Testing has developed a comprehensive online shower technology survey. 

Please click here to take the survey.*

*No login information is required, all individual responses will be held strictly confidential. Results will be published on our site.
Equipping a Pre-School or Nursery?

Traditional tank-type for the home and preschool or more durable flushometer valve/bowl combinations…. 37 different models to choose from….12 different manufacturers!  Bowl heights range from 10 inches (254mm) all the way up to 14 inches (356mm).  Over one-half have been MaP-tested for flush performance.

View our updated listing of all children’s and juvenile toilet models for North America

Mystery Flushes, Building Managers Beware!

What are those water-wasting phantom flushes building managers are hearing about?  And why regular maintenance of premise plumbing is essential.  Check this to read what the Sierra Club and the Guardian newspaper have to say.

Contact us

John Koeller, P.E.

Principal, Koeller & Company
Office – 714.777.2744
Mobile – 714.757.0679
Email –

Bill Gauley, P.Eng.

Principal, Gauley Associates, Ltd.
Mobile – 416.677.6193
Email –

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