Author Topic: Iron and IPA's  (Read 1431 times)

Offline quest4watneys

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Iron and IPA's
« on: November 11, 2013, 08:59:32 PM »
I was asking an employee at my LHBS about local water and brewing IPA's. He said that it's important to remove chlorine and iron in order to brew a good IPA and that I could achieve both of these tasks by using a carbon filter. However, when I started researching carbon filters, the info I read stated that
they're not very good at removing iron but very effective at removing chlorine. Which is correct?
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Offline wingnut

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Re: Iron and IPA's
« Reply #1 on: November 11, 2013, 09:49:49 PM »
Filter will remove some iron, but not all.  Depending on how much iron you have it may be perfect. 

Essentially, my water used to have a metalic taste to it, after running through a filter, it was much better. 

I brewed with the filtered water and won many awards with my lagers and light ales...so I the answer is...they are both right.

The filter may remove enough you can brew with it, but it is not 100% effective... but it likely be effective enough.
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Offline punatic

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Re: Iron and IPA's
« Reply #2 on: November 12, 2013, 01:01:42 AM »
Carbon filtration will not remove dissolved iron.  A water softener (salt softening/ion exchange) will remove some.  Reverse osmosis will remove almost all dissolved iron.

Carbon filtration will remove chlorine.  Chloramines require longer contact time with the carbon for removal. 
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Offline hopfenundmalz

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Re: Iron and IPA's
« Reply #3 on: November 12, 2013, 05:39:53 AM »
Martin should have some input on this one, as he lives close by.

I would think the alkalinity might also be a problem.
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Offline mabrungard

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Re: Iron and IPA's
« Reply #4 on: November 12, 2013, 06:27:01 AM »
A greensand filter is effective at removing iron and manganese. Activated carbon is not effective at iron removal. Ion-exchange is a common iron removal technique and is suitable if the raw water is otherwise free of calcium and magnesium. If there is a lot of Ca or Mg, then the resulting Na or K content of the ion-exchange treated water is likely to be too high to brew with.
« Last Edit: November 12, 2013, 12:44:53 PM by mabrungard »
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Re: Iron and IPA's
« Reply #5 on: November 12, 2013, 07:08:23 AM »
Can't you just toss a magnet into the kettle? ;D

Offline HoosierBrew

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Re: Iron and IPA's
« Reply #6 on: November 12, 2013, 07:26:43 AM »
RO water in Indy for me. Pretty consistent.
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Offline quest4watneys

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Re: Iron and IPA's
« Reply #7 on: November 12, 2013, 12:51:15 PM »
Thanks for the info :0)
Jon, do you buy your RO water or have your own RO filtration system?

Martin, we're both pulling from the same water supply. How do you handle it?
« Last Edit: November 12, 2013, 12:53:50 PM by quest4watneys »
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Offline HoosierBrew

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Re: Iron and IPA's
« Reply #8 on: November 12, 2013, 01:02:04 PM »
Thanks for the info :0)
Jon, do you buy your RO water or have your own RO filtration system?

Martin, we're both pulling from the same water supply. How do you handle it?
I buy it at a local grocery for ~ 29 cents/gallon. Makes a nice consistent base to build on.
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Offline HoosierBrew

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Re: Iron and IPA's
« Reply #9 on: November 12, 2013, 01:23:20 PM »
Thanks for the info :0)
Jon, do you buy your RO water or have your own RO filtration system?

Martin, we're both pulling from the same water supply. How do you handle it?
I buy it at a local grocery for ~ 29 cents/gallon. Makes a nice consistent base to build on.
BTW that price is based on using the big RO dispenser where you fill it your self.  I live near a Meijer and they happen to have a machine. Pretty cheap.
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Offline hopfenundmalz

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Re: Iron and IPA's
« Reply #10 on: November 12, 2013, 03:01:30 PM »
Thanks for the info :0)
Jon, do you buy your RO water or have your own RO filtration system?

Martin, we're both pulling from the same water supply. How do you handle it?
I buy it at a local grocery for ~ 29 cents/gallon. Makes a nice consistent base to build on.
BTW that price is based on using the big RO dispenser where you fill it your self.  I live near a Meijer and they happen to have a machine. Pretty cheap.

The Meier in Novi MI recently went up to 39 cents/gallon. I still use it.
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Offline quest4watneys

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Re: Iron and IPA's
« Reply #11 on: November 12, 2013, 07:59:42 PM »
The Meier in Novi MI recently went up to 39 cents/gallon. I still use it.

That's cheaper than I would've guessed. I've used the 5 gallon filtered water bottles and it seems they're more expensive. I'll have to make a trip to Meijer right down the street :0)
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Offline punatic

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Re: Iron and IPA's
« Reply #12 on: November 12, 2013, 11:27:43 PM »
You may want to check on the type of treatment provided by those bring-your-own-bottle water vending machines.  Many use municipal water, carbon filter it, send it through a UV disinfecting unit, and/or ozonate it, and dispense it by the gallon - basically, city water with the chlorine removed.

The machines that provide water pushed through RO membranes will most likely be marked fairly prominently as being treated by reverse osmosis.
« Last Edit: November 12, 2013, 11:33:21 PM by punatic »
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Offline HoosierBrew

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Re: Iron and IPA's
« Reply #13 on: November 13, 2013, 05:50:33 AM »
FWIW quest4watneys, the machine I use (@ Meijer) states that its water is purified by RO.
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Offline brewmichigan

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Re: Iron and IPA's
« Reply #14 on: November 13, 2013, 06:56:22 AM »
FWIW quest4watneys, the machine I use (@ Meijer) states that its water is purified by RO.
Same with me.

See the first FAQ for the water I use.
http://glacierwater.com/ask-glacier/faqs/
« Last Edit: November 13, 2013, 06:58:56 AM by brewmichigan »
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