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Old 02-13-2010, 11:17 PM   #1
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Default Favorite Carbon Filter Setups?

Right now I carbon filter my brewing water by taking the housing and filter out of the household pitcher and dripping through that into a kettle.

This takes between 45 minutes and 2 hours depending on the brewday.

Any ideas for speeding this process up? can I use a beer filter such as this one or this one (which I swear I saw at the local brewpub's water line) to remove chlorine?

Otherwise my very soft Seattle tap water suits very well for brewing.

Thanks for the help gents.

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Old 02-13-2010, 11:28 PM   #2
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Walmart has that setup for about the same price. A pair of carbon filters for it is around $9.

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Old 02-13-2010, 11:30 PM   #3
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I used to use an under the sink cartridge type filter, the second one you listed. I had it set so I could hook it up to my kitchen faucet and after I was done would break it down to let it dry out.

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Old 02-13-2010, 11:41 PM   #4
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I guess what I'm asking is related to speed.
-Can you get a decent flow rate with in line carbon filtration? Is the slow drip the key to its usefulness (I doubt that)

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Old 02-14-2010, 12:05 AM   #5
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You've got to run it slow enough for the carbon to grab the chlorine or chloramine but since it's got so much more surface area than the pitcher types, you can run it at like a quart a minute.

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Old 02-14-2010, 12:46 AM   #6
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Bobby usually I would agree with you, this time I disagree. I did a lot of research(internet) on this subject. Activated carbon works by absorption through micro-fissure in the carbon particle. Any substance filtered through activated carbon has to travel through these micro-fissures to achieve filtration. Due to the size of the fissure, speed can not be attained and keep the purity. By trying to achieve high flow rates most of the solution will flow around the activated carbon and not through it. I have used activated carbon for water purification in a commercial high end tropical fish business and homebrew production. I have also used it to remove contaminates from distilled beverages. In every application the solution needs to trickle through the activated carbon for maximum contaminate removal. Trying to pressure feed a carbon bed only forces the solution around the carbon with little going through the micro-fissures. we are dealing with dissolved contaminates which in essence cannot be filtered, that is why carbon works because it absorbs it. Unfortunately absorption takes time.
OP, have you thought about installing a float valve similar to what is used in a toilet? This would allow you to trickle through the filter the night before brewing without overflowing your HLT.

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Old 02-14-2010, 12:59 AM   #7
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Quote:
Originally Posted by beerthirty View Post
OP, have you thought about installing a float valve similar to what is used in a toilet? This would allow you to trickle through the filter the night before brewing without overflowing your HLT.
yeah, float switch had come to mind but I was hoping for a simpler solution.

If we're talking night before, I think I'd rather just fill my cooler MLT with 10 gallons of water and drip at a slightly slower rate than the drips on the brita filter. At that point, 8 hrs of filtration time is not a big deal. Of course, this would require some forethought but would eliminate the speed concern.
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Old 02-14-2010, 01:06 AM   #8
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so assuming that a trickle will get the best chlorine absorption,

Will a slightly faster flow yield acceptable chlorine levels? I'm really interested by all the replies so far, thanks Bobby, Thirty and Ray

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Old 02-14-2010, 01:31 AM   #9
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What I posted was for optimum contaminate removal. I'm often cursed by time so I usually filter at Bobbys rate then add campden tablets. If you are only dealing with chlorine and not chlorimine then the combination of filter and campden works pretty well.

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Old 02-14-2010, 01:47 AM   #10
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My carbon filter is rated at 4-12 GPM I run it at about 1-2 GPM and it works great

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