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Old 10-06-2013, 12:46 PM   #1
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Flushing membrane in RO/DI units

When flushing the membrane in the ro/di units how long do you the unit flush?
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Old 10-06-2013, 02:24 PM   #2
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5-10 minutes IMO.
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Old 10-06-2013, 03:18 PM   #3
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Agreed.... 5 minutes usually does the trick. I'll flush mine at the end of every production cycle, which is usually about 40 gallons at a time.
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Old 10-06-2013, 07:34 PM   #4
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Thanks guys. I lost the track of time and ending up flushing it for 30min. Next time will watch clock more carefully.
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Old 10-06-2013, 07:41 PM   #5
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Well, you didn't hurt anything, but you just added a few $$ to your water bill........

Don't feel bad.... whenever I make RODI, I do laundry, running the waste line to fill the washing machine. ONCE I got into something else & forgot to set the timer and wound up flooding the washing machine & part of my basement.......

You learn the most from your mistakes........
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Old 10-06-2013, 07:42 PM   #6
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The instructions on my unit said 5 gallons of di so that's what I did
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Old 10-06-2013, 07:51 PM   #7
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I base mine on TDS..... since I've got a dual inline meter (one between membrane & resin, and the other after resin) I can monitor the condition of both the membrane & the resin. When the TDS out of the membrane begins to climb a point or two is when I flush, and that usually takes about 30-40 gallons.
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Old 10-06-2013, 08:26 PM   #8
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Quote:
Originally Posted by Phranque View Post
I base mine on TDS..... since I've got a dual inline meter (one between membrane & resin, and the other after resin) I can monitor the condition of both the membrane & the resin. When the TDS out of the membrane begins to climb a point or two is when I flush, and that usually takes about 30-40 gallons.
That's how I do it as well.
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