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stevieg

  • Posts: 522
2 or 3 prefilters?
« on: February 20, 2015, 07:48:22 am »
Hi,i have a 440 ro and it has 2 pre filters,my friends is one of the smaller types (450 gallons per day,but nowhere near)his has 3 pre filters! Can someone explain this discrepancy? and the advantages/dis?
Thanks.
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Ian101

  • Posts: 7887
Re: 2 or 3 prefilters?
« Reply #1 on: February 20, 2015, 07:50:37 am »
is one a di resin filter perhaps ?
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Mike #1

  • Posts: 4668
Re: 2 or 3 prefilters?
« Reply #2 on: February 20, 2015, 07:55:49 am »
Their is no discrepancy depends were he bought and what they advised , I live in a soft water area and bought mine from Daqua after a quick chat with Doug .
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stevieg

  • Posts: 522
Re: 2 or 3 prefilters?
« Reply #3 on: February 20, 2015, 07:58:30 am »
Hi,it is just a filter!
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SeanK

Re: 2 or 3 prefilters?
« Reply #4 on: February 20, 2015, 08:41:18 am »
He will have a sediment filter a carbon block filter and a carbon granular filter (GAC) and you will only
have the first two.
Pre filters have only one job and that's to protect the R.O. membrane, they don't make a difference to the TDS
so as long as your R.O. membranes are lasting then I wouldn't worry about it.


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Mist A Bit

  • Posts: 1032
Re: 2 or 3 prefilters?
« Reply #5 on: February 20, 2015, 06:30:50 pm »
You Dont need 3 filters, those little ro systems were designed for a different application
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Twc services

  • Posts: 243
Re: 2 or 3 prefilters?
« Reply #6 on: February 20, 2015, 06:53:29 pm »
Quote from: eco-clean (nottingham) on February 20, 2015, 06:30:50 pm
You Dont need 3 filters, those little ro systems were designed for a different application


3 is for drinking water systems.
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