Archive for April 5th, 2009

More toilet talk – MaP

Sunday, April 5th, 2009

In my continuing research on low-flush and dual-flush toilets (following up on my previous post), I came across a fascinating report.  It describes the standardized methodology for testing how well various toilets do at flushing away the solid stuff.

Apparently people in a lab somewhere use 50 gram preparations of soybean paste in latex casings.

Cased media - soybean paste for MaP

The pass/fail level is 250 grams, i.e. five chunks of soybean paste.

The original minimum performance benchmark adopted by MaP was 250 grams (250g) of waste. That is,
a toilet fixture should completely evacuate at least 250g of waste in a single flush action. This value is
based on the results of a British medical study (Variability of Colonic Function in Healthy Subjects) that
identified 250g as the average maximum fecal size of the male participants in the study. Thus, any toilet
that meets or exceeds the 250g performance threshold should meet customer expectations for flushing.

Now I know that the people who produced this report are performing a good public service, since not all toilets are created equal and the consumer should know what to expect before testing the new throne out.  However the image of white-jacketed lab workers flushing re-usable tubes of soybean paste down the toilet while taking notes on a clipboard just strikes me as funny.

But it sure beats some of the possible testing options.

Anyway, yesterday I installed our new dual-flush toilet.  It’s a Rona Collection EL, made by Foremost (MaP Test Report No. 8-530).  It’s rated as capable of evacuating 700 grams of solid waste (i.e. 14 chunks of soybean paste) on a 6 litre flush,  so I think it should meet my solid waste removal needs.