Thread Number: 68744
/ Tag: Modern Dishwashers
UltraWash Three stage Filteration? Huh? |
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Post# 915489 , Reply# 4   1/13/2017 at 11:34 (2,652 days old) by super32 (Blackstone Massachusetts)   |   | |
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Post# 915540 , Reply# 6   1/13/2017 at 17:23 (2,652 days old) by johnb300m (Chicago)   |   | |
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Here's a little engineering lesson.
Many of you are right. It's a bit of a marketing gimmick. I've attached a visual drawing which I hope helps understand the basic layout of these removable filter systems used in many popular brands today. These systems all have 3 common components. A coarse strainer that protects the drain receptacle, and is located above the micro fine screen filter cup. (AFAIK, they're all cup shaped). A medium gauge pan-shaped filter screen that covers the entire sump area, creating a cavity separation between the tub and the wash pump inlet. A microfine filter in a cup shape, that separates the cavity between the drain pump and under the medium gauge filter screen. During wash operation, water is drawn into the wash pump, and it has two possible paths to travel, which depends on what particle sizes are removed in that particular journey. The water can go through the medium screen which filters out larger and middle sized particles, yet they won't interfere with the pump or spray jets. Tiny particles will pass through and distribute in the tub. Water could also be drawn into the filter cup, where the coarse strainer will block very large debris that could clog the wash AND drain pumps. Middle and tiny particles pass through and are caught in the micro mesh cup screen, where they reside in a chamber separated from the wash pump. They reside here until drain pump activation, where they are removed from the chamber and sent to the drain. At no point does water ever go through 3 filter screens in series. Maybe two at maximum. And with a long enough run time, it is plausible that all soils of all sizes will eventually be caught by the coarse and micro mesh screen cup waiting for a drain sequence. They're obviously very effective, but the triple filter claim is pure marketing jargon. JUST like the hard food disposer claim in GE's tall tub dishwashers ever since aprox. 2002. The grinder blades are open with no macerating screens like WP's. And the blades are behind all the main filter screens anyway. So they never really see soils. And what little soil they do see, there's no gauged screen to meter soil flow before the blades can work on it. Purely there for marketing to say it's there.
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Post# 915546 , Reply# 7   1/13/2017 at 18:29 (2,652 days old) by logixx (Germany)   |   | |
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Before they came out with their new dishwasher platform, Bosch used to have triple filtration. I liked that system more than the new "HEPA" type of micro filter.
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