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por acquamen 74 (2018-10-10)

MISSISSAUGA, ONTARIO -- Pipes engineer John Koeller of California and Canadian engineer Bill Gauley of Veritec Consulting here have issued their third edition of "Maximum Performance Testing of Popular flushing Toilet-Click here Models" In addition, the two have released a supplemental report, "Evaluation of Water-Efficient Toilet Technologies to Take Waste in Drainlines."


As Usual, the reports raise as many questions as they provide answers.


The Evaluation protocol for your MaP tests is to flush soybean curd shaped into 50-gram "logs" and a four crumpled wads of six sheets each of single-ply flushing toilet paper meeting the specifications set forth in ASME Standard A112.


Based On an old British clinical study, Koeller and Gauley understood that the average human fecal size is 130 g and a mean maximum for a male is 250 grams. The engineers determined that a decent toilet needs to be able to flush 250 grams or more. The bathrooms are loaded with bean curd in 50-gram increments and smashed until they're so loaded that they neglect.



When The pair performed that the bean curd test back in 2003, the top flusher was the Toto Drake that downed 900 g, followed with the Crane VlP Flush at 725 g (August 2003, pg. 7). This year the winner is one of those variations of this Mansfield Quantum at 925 g. That converts to about two lb., a prodigious load for both a flushing toilet and its user.


What is Striking about the results will be how distinct they are when bowls or tanks have been altered for the same version of toilet. There are 3 pressure-assisted Mansfield Quantum toilets near the surface of the list, flushing from 925 to 825 g, depending on what tank is used. The exact same can be said for almost every manufacturer.


Crane Includes a VIP Flush that goes 725 grams, but a switch in the bowl out of another model moves it down to 350 grams. One Eljer Patriot flushes 425 g, yet another 150. 1 American Standard Cadet moves 750 g, but two others flush 125 and 150 grams.


The Researchers found that the flushing toilets were often not 1.6-gpf toilets when the water level was set to the water line within the tank. Some bathrooms flushed less, a few more, and also the worst offender was a Komet Deco that flushed 2.51 gal. When put into the waterline.


Gerber Pipes Vice President Ron Grabski said he believes that toilet tests are too variable to be credible.


"While It [the evaluation] seems ineffective, but some of the soybean pieces break and a few don't, and while that's what happens in the actual world, it's not really a repeatable evaluation," Grabski mentioned. "You may get two distinct results."


Kathryn Streeby, Kohler senior product manager for toilets, said the same thing following the initial round of tests in August 2003. Kohler pretty much dismisses the tests, she said. Instead, a group of about 15 people from engineering, marketing and manufacturing change their toilets every few months and compare notes concerning different makes and models.


"They Don't test nearly enough trials, which is understandable because of the cost involved and the opportunity to do so carefully and accurately," said Pete DeMarco, director of compliance engineering for American Standard.


DeMarco Said that although all the engineers who have been testing flushing toilets--Click here for Veritec, National Association of Home Builders and Consumer Reports are brilliant engineers, they are undone by the enormity of the task. Because a few of these toilets are manufactured in the millions, DeMarco considers at least 30 bathrooms of one version would have to be analyzed to attain statistical significance.


DeMarco's Information to plumbing contractors is, "Nothing they read in such evaluation reports should overrule the real-world encounter they've had with these toilets."


The Drainline carry study analyzed flushing toilets by type: gravity with a 3-in. Valve; gravity tipping buck (a Niagara model); jet and gravity in trapway; gravity siphon jet at lieu of bowl; gravity rim jet; gravity vacuum assistance; pressure-assisted 1.6-gpf; and pressure-assisted 1.0-gpf. They tested drainline slopes of horizontal, 1% and 2%, 3-in. and 4-in. Pipe diameters, and vertical drops of 6. and 35 in.


In An perfect world, the best drainline carry came from a 1.6-gpf pressure-assisted toilet flushing through a 3-in. Pipe at a 2% incline. In the actual world, however, the researchers noted that the difficulty of achieving a 2% incline with the 2-in. -by-8-in. Beams that are standard in the majority of construction. The test media was also drained through clear, smooth-walled plastic pipe.


Gauley Included many of his own questions at the beginning of the report for which he Did not have the time or funding to study. What about cast iron or Old pipe, Gauley asked at the beginning of his report. He expressed Curiosity about the ramifications of various pipe couplings, supplemental flows, Sanitary napkins, bigger loadings of flushing toilet paper, and contrasts from different test media and methodologies

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