Water purification filter

Discussion in 'General Survival and Preparedness' started by monkeyman, Sep 5, 2005.

  1. monkeyman

    monkeyman Monkey+++ Moderator Emeritus Founding Member

    Ok, as most of you know Im the resident cheap skate, so heres the question, what would be the cheapest effective water filtering system that you dont have to replace the filters in all the time? Better yet dose anyone know how to build one yourself? From what Ive heard the Berkeys would be great but I understand they also run like $200+ most of the time. I would like to come up with a means of makeing potable water that dosnt have to have replacement filters but also as cheap as I can get and DIY would be ideal. Any sugestions?
  2. ghostrider

    ghostrider Resident Poltergeist Founding Member

    A pant leg with the bottom tied, a couple of handfuls of charcoal dumped in, and the rest of the leg filled with sand. Still gotta boil it, but it will filter out most of the organisms and mud.
  3. melbo

    melbo Hunter Gatherer Administrator Founding Member

    Along those same lines, I bet you could construct something out of a 5 gallon bucket filled with layers of cloth and sand/charcoal. Spigot on the bottom.

    Wine and beer making supply stores have lots of different attachments for working with 5 gallon buckets.

    Problem is portability. If you are looking for permanent, I'd look into a rooftop collection system that flows a downspout into a 55 gallon container
  4. monkeyman

    monkeyman Monkey+++ Moderator Emeritus Founding Member

    It wouldnt have to be convenient to lug around all the time so a 5 gallon bucket would likely work. I may be off on it but I understand that the berkeys use a ceramic filter? Would water filter through a flower pot if you got one with out the hole in the bottom in a similar way or am I way off here?
  5. Minuteman

    Minuteman Chaplain Moderator Founding Member

    The Berky filters last almost forever.I have ran at least several hundred gallons through mine and they are still as good as the day I put them in.A couple minutes with a toothbrush and they are good as new. I only use 2 of the 4 that it comes with.Saving the other 2 for SHTF use.

    It isn't just the ceramic filter,they are also silver impregnated and that is what kills all the bacteria.Just filtering the sediment doesn't make it safe to drink.And any method used to sanitize it leaves it with a bland (if boiled) or bitter (purification tabs) taste. The thing about the berky and related filters is that they not only make it safe to drink but better tasting too.

    They are a considerable investment but well worth any sacrifice you would have to make to afford one.I would give up a lot of things in my survival arsenal before I would the Berky. Clean, safe water, is one of the most important things there is in a survival situation.

    Remember the rule of threes

    You can only live;
    three minutes without air
    three days without water
    three weeks without food
    three months without hope
  6. melbo

    melbo Hunter Gatherer Administrator Founding Member

    Yeah, I use 2 of my 4 also. SLows it down quite a bit, especially when the filters are dry.. Take a day or 2 to fully saturate them. The clay pot wouldn't really do anything that a bandana wouldn't do. Just chunk removal, not purification.

    Minuteman's right. Water is so important that I'd sell a gun to get a good one if I had to. Priorities first.
  7. monkeyman

    monkeyman Monkey+++ Moderator Emeritus Founding Member

    When money permits I figure I probably will get a Berkey, basicly trying to come up with something in case one is needed in the meantime. I realy dont have a whole lot to sell off and as far as guns, definatly not enouph to be selling any off and also no one of my guns would bring enouph so theat would mean 2 or 3 of them, aproaching 1/2 of all the guns in the house. Hopefuly I can get set up and rolling on makeing knives soon and that may help out a lot if I can get them done well enouph to bring a decent price, then I can buy more of the stuff I need or would like to have.
  8. Ganado

    Ganado Monkey+++

    Numerous methods for precipitating the salt out of sea water to make it potable have been tested at the Naval Medical Research Institute; the process finally adopted bothby the Navy Bureau of Aeronautics and by the Air Force is the one developed by thePermutit Company for demineralizing sea water. The essential materials for the Permutit method aresilver zeolite and a plastic bag
    in which to carry on the reactions of demineralizing the salt water. These minerals are made up into a small kit contained in a metal box. The silver zeolite is compressed into a briquette, six of which are packedin the kit. The plastic bag holds a pint of water and is fitted at one end with a cotton disc filter and a tube through which water may be withdrawn; the other end is open, but is rolled up and fastened after filling the bag.

    To use, the bag is filled with sea water to the pint mark, one briquette of silver zeolite is added, and then the bag is kneaded for 20 minutes to break up the briquette and to allow the reaction of the silv
    er zeolite with the sodium chloride. Silver chloride and sodium zeolite are products of this reaction,
    both of which precipitate according to the following equation:
    2NaCl(aq) + Ag 2 Z(s) = = > 2AgCl(s) + Na2Z(s)
    About 80% of the total solids in the sea water are removed by this reaction making the water suitable to drink without being distasteful and without producing undue thirst. The treated water can be removed to another vessel or taken directly from the outlet tube of the plastic bag. The precipitated solids arewashed out with salt water and the bag is ready for use again. Only 6 briquettes are furnished with each kit because the cotton disc filter becomes too clogged for further use after this number of filtrations. No economically feasible ion exchange process has yet been developed which will demineralize sea water in larger quantities.

    http://www.bluewaternavy.org/distillation/Water treatment.pdf
    anyone familiar with this method of desal?
    GrayGhost and Cruisin Sloth like this.
  9. arleigh

    arleigh Goophy monkey

    Solar distillation works, but is not as fast. and I believe it takes a few times to accomplish full distillation.
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