What material for filtration column
- Hi All, first post here. I have searched this group for info on what type of material to use for my activated carbon column. I read about copper, stainless and i just saw a photo with black plastic plumbing pipe. I would very much like to use the plastic pipe because of the incredibly high cost of copper (and stainless)tubing right now. I have read about the issues of using plastic and rubber products with high % ethanol but I would be doing my purifying at below 50%. Any ideas for an inexpensive, easy to clean column material that will not break down or add off flavors or dangerous elements to my spirit would be greatly appreciated.
- here in NZ the commercial ones for home distillers are made from food grade plastic. I filter at ~50% so no issues that I'm aware of, and they've been selling them in the shops for years.
- At 02:32 PM 3/28/2012, you wrote:
>These are my thoughts, not scientifically supported facts. Alcohol
>here in NZ the commercial ones for home distillers are made from
>food grade plastic. I filter at ~50% so no issues that I'm aware of,
>and they've been selling them in the shops for years.
that sits on plastic for a long time at say 40% is not a good
thing. Yes, I know certain alcoholic beverages are sold in plastic
containers. Do I trust the opinions of manufacturers about the
safety of such things. Not bloody likely. On the other hand, when
alcohol say 50%abv goes through a filter, the contact time is pretty
darn quick. I have a electric wine filter that I use so my white
wines are truly sparkling crystal clear. There are plastic
parts. Contact time is seconds. I phoned the manufacturer and asked
them if it would handle 40% abv without any discernible chemical
interaction and they told me they had in fact done tests up to 40%
and it was just fine. Given the time of contact, I'm willing to take
that risk. It's sort of neat after doing all our fermenting and
distilling to end up with a crystal clear product.
OTOH, I would never ever ever filter a red wine. Natural settling
and siphoning yes, but a filter will take out valuable products that
contribute to positive aging of the wine, which is why modern
filtered red wines don't really age or change very much. I document
the change in taste in my reds out to about 15 years. After that, I
just drink them.
- If you are using plastic, you'll want to use PE (polyethylene) or PP (polypropylene) for the column.For rubber seals, use EPDM (perxoxide cured if you have a choice). You can use teflon of course, but as its a plastic, it'll more readily take a 'set' after awhile of being tightened down in a fixture and thus may leak.In general, always look for items that are NSF approved for potable water.These will be 'cleaner' than general purpose / industrial products.