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Old 10/25/2003, 07:47 PM   #1
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Join Date: May 2003
Location: Town and Country, MO
Posts: 437
More impurities at Startup ?

Hi Folks,

It's my understanding that each time an RO/DI unit starts producing filtered water, a small amount of impurities gets through the membrane. I.E. if a float valve closes after a small amount of water is filtered, say a 1 gallon cycle. A greater amount of impurities get through, than a cycle that produces say 20 gallons at a time.

I believe this has been a common statement across many threads, and a reason I implemented high and low water sensor to control my RO/DI unit (I produce ~30 gallons at a time). However, the veracity of this statement was recently questioned, and I honestly don't know if it's true / false / or a no-op. Could you shed some light on it ?

Rob A.

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