Using a carbon filter and Sodium Met

[chastuck]

I know it's overkill, but I was thinking of using a 10" domestic carbon filter kit from Screwfix as well as continuing to use Sodium Metabisulphite to treat my water prior to brewing. I know the filter will remove most of the chlorine but not the chloramines and in the past I have always used Sodium Met to remove both. I would run the water through the filter first and then add my usual quantity of sodium met. I'm just wondering what happens to the sodium met in solution if there is no chlorine to react with. Presumably no sodium chlorides would form, or at least only very little arising from the residual chloramines. Anyone have a definitive answer on this one?

[Wolfy]

Wiki says that your activated carbon filter will remove chloramines, have you tested it to see if you have enough chloramine to worry about after filtering the water?

[Manx Guy]

Hi!

I recently set up a two stage filter system in my 'coal house brweery' as the water supply is via an 'outside tap' (Which is actually inside) I have pre filter to remove sediment & heavey meatals and a 1 micron carbon filter. This suits my needs as the water company sattes it does not use Chloramines only chlorine (dosed as needed as our water is from surface sources and the bacterial load changes over the course of the year.

I used to use an undersink system in the house similar to a water gem filter but used a better US made filter that had a genuine 12 month life due to anti bacterial media.

I maybe wrong on this but you maybe able to get a 10" GAC filter that removes Chloramines also. Wreakin water filters and Hanwells have both been very helpful in the past (although you may find cheaperif you shop around). By all means get the kit from Screwfix but you maybe able to buy a better replacement filter from a specialist water filtration place.

Good luck !

Guy

[chastuck]

Wiki says that your activated carbon filter will remove chloramines, have you tested it to see if you have enough chloramine to worry about after filtering the water?

To a certain extent this is true. But my web research has shown you need a very, very low flow rate through the filter and that the filters soon become saturated and actually start to pass chloromines back into the flow water.

[chastuck]

Wiki says that your activated carbon filter will remove chloramines, have you tested it to see if you have enough chloramine to worry about after filtering the water?

To a certain extent this is true. But my web research has shown you need a very, very low flow rate through the filter and that the filters soon become saturated and actually start to pass chloromines back into the flow water.

One article quoted that "The size of carbon filter required to filter choramines from water at a rate of 1 gallons per minute is 110 lbs"

[chastuck]

I've been thinking further about this and maybe doing it the other way round would be better. I will use sodium or potassium met on the water straight from the tap and then pump it through the filter to remove any organics,VOCs, bacterial, sediment, etc., that may be in there.

[Manx Guy]

I've been thinking further about this and maybe doing it the other way round would be better. I will use sodium or potassium met on the water straight from the tap and then pump it through the filter to remove any organics,VOCs, bacterial, sediment, etc., that may be in there.

Sounds like a good idea if a bit of a faff!

Good luck and let us know how it works!



Guy