RO polishing carbon stage 5 filter direction of flow ?


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Old 09-18-22, 08:38 AM
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RO polishing carbon stage 5 filter direction of flow ?


Last year I replaced the filters. I noted the flow direction of the polishing carbon filter, & installed the new one the same way, even though label would be upside down. Today I did a filter change, & started wondering maybe the direction is wrong. My question is, how would know if it's wrong ? Maybe the pic would tell you something, flow is to the right. Thanks
 

Last edited by bobdee; 09-18-22 at 10:20 AM.
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Old 09-18-22, 10:21 AM
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What does your carbon filter look like? Are both ends of the filter the same? If so the orientation doesn't matter which is common with RO filters.
 
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Old 09-18-22, 10:53 AM
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I'm talking about the "polishing carbon filter stage 5" labeled in the pic. Not the screw on carbon filter.
 
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Old 09-18-22, 12:25 PM
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The outlet of the filter goes to the house/faucet on mine is the top left. If the filter has a direction, I don't recall, that would define it!
 
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Old 09-18-22, 02:04 PM
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Thanks, my outlet (flow) is on the right, & goes to the house/faucet, so must be correct. I'm curious though, what would happen if that filter was turned around, restricted flow? black water? idk.
 
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Old 10-31-22, 12:26 PM
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Anyone know what would happen ?
 
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Old 10-31-22, 12:50 PM
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Here's a semi-educated guess: The filter material is usually a hollow tube, like a section of thick walled pipe. The inlet of the filter usually leads to the outside of the filter tube, and the outlet comes from the inside of the tube, so the water flows from the outside of the tube to the inside.

If you think about it, it's clear that the surface area of the outer part of the filter tube is greater than the surface area of the inside of the filter tube. If you hook it up backwards, the water will flow from the inside to the outside. Since the inside has less surface area, and the largest particles of "stuff" are trapped on or near the surface of the filter, the filter will clog up faster than if it was hooked up the correct way. On something like a polishing filter where the water entering the filter is already really clean, I doubt it makes much difference.

On coarser filters with dirtier water, it likely makes quite a difference, especially since they often have graduated media (outer layer is coarser, middle finer, inside finest).

 
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Old 10-31-22, 01:54 PM
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Thanks for that explanation.
 
 

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