MaP Testing


Check out our ‘Reports’ page

….over 60 different documents (reports, articles, and other information) related to water efficiency and plumbing products.

1,320 WaterSense-certified tank-type high-efficiency toilets….930 have been tested for their flush performance!


Over 350 commercial flushometer valve/bowl combinations tested for flush performance…..two-thirds are high-efficiency rated!

It takes 635 gallons of water to make one hamburger.

(Global Water Partnership blog, March 22, 2011)

But only a gallon to flush it!

Are water-efficient fixtures, equipment, & appliances ‘starving’ building drains of water?

The drainline study project of the 6-member Plumbing Efficiency Research Coalition is underway!  Learn more about this very important research into ‘dry drains’ and what can be done with less water in our building drain systems.

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.
Office – 519.853.8847
Mobile – 416.677.6193
Email –

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