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Old 07-11-2012, 03:37 AM   #1
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Ro/di unit help!

Hey guys, jus got my ro/di unit and my pre sediment filter is 5 micron. Is this too large as 1 micron seems to be mentioned more?

Thanks mark
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Old 07-11-2012, 03:52 AM   #2
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How many stages and what are they?
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Old 07-11-2012, 04:12 AM   #3
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How many stages and what are they?
4stage mate. Shall i just replace to a 1 micron so the carbon filter isnt at risk of getting blocked?
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Old 07-11-2012, 04:19 AM   #4
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Originally Posted by NightHawk-33

4stage mate. Shall i just replace to a 1 micron so the carbon filter isnt at risk of getting blocked?
No. The carbon filter and the sediment filter should be the same size. The carbon filter will not get blocked. I run a 5 micron sediment and carbon filter. 1 micron just means your going to be replacing filters more often because of clogging/reduced pressure. Sediment and carbon block should match.
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Old 07-11-2012, 04:32 AM   #5
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No. The carbon filter and the sediment filter should be the same size. The carbon filter will not get blocked. I run a 5 micron sediment and carbon filter. 1 micron just means your going to be replacing filters more often because of clogging/reduced pressure. Sediment and carbon block should match.
Ohhh, well i think my sediment is 5 micron and my carbon is 1 micron so which would you recommend i change?
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Old 07-11-2012, 08:00 AM   #6
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I think what size pre-filters you use depends a lot on your source water. I have a well with high iron content, so the filter people recommended a 5 micron followed by a 1 micron sediment filter. I will have to change pre-filters at an accelerated rate, but the RO membrane should last longer.

If your on a city water supply I would recommend a 5 micron sediment followed by two 5 micron carbon blocks.
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Old 07-11-2012, 09:33 AM   #7
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Originally Posted by NightHawk-33

Ohhh, well i think my sediment is 5 micron and my carbon is 1 micron so which would you recommend i change?
Depends how long you want your membrane to last and how often you wanna change out sediment filters.

I run a 5 micron sediment filter and carbon block, no problems
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Old 07-11-2012, 11:29 AM   #8
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Depends how long you want your membrane to last and how often you wanna change out sediment filters.

I run a 5 micron sediment filter and carbon block, no problems
So if the micron rating is lower, the system will be more efficent? Or is the water still good enough for reef use with a higher micron rating?
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Old 07-11-2012, 02:29 PM   #9
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Originally Posted by NightHawk-33

So if the micron rating is lower, the system will be more efficent? Or is the water still good enough for reef use with a higher micron rating?
The RO Membrane will still remove the same particulates the sediment filter would, but a sediment filter runs 5-10 bucks to replace, and the TFC RO membrane costs 65-100 bucks to replace. So the more stuff you can keep out of the membrane the longer it will last. You can also prolong the life of your membrane by installing and using a flush kit which will flush the membrane whenever you run it.
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Old 07-11-2012, 04:17 PM   #10
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The RO Membrane will still remove the same particulates the sediment filter would, but a sediment filter runs 5-10 bucks to replace, and the TFC RO membrane costs 65-100 bucks to replace. So the more stuff you can keep out of the membrane the longer it will last. You can also prolong the life of your membrane by installing and using a flush kit which will flush the membrane whenever you run it.
My ro/di unit had a membrane flush kit installed but it dosent explain how to use it! Could you explain please?
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