Green Toilet Survey Shows Not All Toilets Are Created Equal

I found this great survey on toilets. Veritec, a testing company, tested 700 toilets for flush power, water savings, bowl size, flapper size etc. Now this might not excite most people but when you are looking for the most water efficient toilet that also actually flushes everything down this study is amazing.


It shows that clearly not all toilets are equal.

What makes their study great is that they tested the toilets using realistic situations. No they didn’t crap in all 700 hundred toilets. But they did use a soy based paste shaped to look damn convincing.

This is noteworthy in the toilet industry since all tests before them were done with idiotic test materials like ping pong balls and confetti. Obviously this isn’t realistic, unless of course you just came from a really weird ping pong match where you celebrated with confetti, most people don’t crap that sort of stuff.

Anyway, it is better to use the survey backwards, meaning instead of pouring over the 700 toilets to try and find the best one, go to the store and find one you like then look it up on the list. If it matches up to par then great. If not then move on.

You want a WaterSence Certified Toilet. You want it to use 1.28 gallons of water or less. Dual flush isn’t absolutely crucial in my eyes. Not always but most of the time if it’s yellow you can let it mellow.

But you also want it to be able to pass a certain amount of material, called the MaP Flush Performance MFP. A Brittish study showed that most males crap an average maximum of 250 grams, with a 95th percentile crapping just over 300 grams. Women crapped a little less.

I’d say that on average Americans are a little more full of crap than British. But green minded people I would say tend to not be your average American Glutton so this study is applicable to US green toilets in my mind.

The Veritc study suggests toilets have at least a flush power of 250 grams. The US EPA has a minimum flush power restriction of 350g. Truth be told most toilets flush a lot more than that since they need to prepare for the worst. In the 700 toilet study the flush power ranged from the EPA minimum of 350g to a shit kicking 1000g. Their calculations stopped at 1000g so there are actually toilets that go above 1000g/flush.

About the author: Gennaro Brooks-Church

2 comments to “Green Toilet Survey Shows Not All Toilets Are Created Equal”

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  1. Andrea Paulinelli - February 27, 2009 at 7:54 am

    If you are serious about saving water, want a toilet that really works and is affordable, I would highly recommend a Caroma Dual Flush toilet. Caroma toilets offer a patented dual flush technology consisting of a 0.8 Gal flush for liquid waste and a 1.6 Gal flush for solids. On an average of 5 uses a day (4 liquid/ 1 solid) a Caroma Dual Flush toilet uses an average of 0.96 gallons per flush. The new Sydney Smart uses only 1.28 and 0.8 gpf, that is an average of 0.89 gallons per flush. This is the lowest water consumption of any toilet available in the US. Caroma, an Australian company set the standard by giving the world its first successful two button dual flush system in the nineteen eighties and has since perfected the technology. Also, with a full 3.5″ trapway, these toilets virtually never clog. All of Caroma’s toilets are on the list of WaterSense labeled HET’s and also qualify for several toilet rebate programs available in the US. Please visit my blog to learn more or go to to learn where you can find Caroma toilets locally. Visit to see how we flush potatoes with 0.8 gallons of water, meant for liquids only. Best regards, Andrea Paulinelli

  2. david - February 26, 2009 at 9:11 am

    It is so true many toilets are not equal and many just need to come with a plunger fastened to the toilet so it is always there. I have found some of the older toilets work best but they do use to much water. I have done some research on the net over the last year and found a company called selectaflush they can be found at: . selectaflush came up with a dual flush retro kit that take an old toilet and converts it into a dual flush; saving water. I have installed it in all my toilets they never clog but they do save lots of water. I also felt this was a greener solution as my old toilet is not living at the city dump.

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