DIY Gravity Water Filter

Discussion in 'Camping, Hiking, Cooking' started by Trapper Badovinac, Jun 6, 2014.

  1. Trapper Badovinac

    Trapper Badovinac Author, Writer, Photographer

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    When you need filtered drinking water for 12 - 20 people you figure out really soon that pumping by hand doesn't work well.

    I built this after seeing something similar and then doing some research and a few trips to the hardware store.
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    It's gravity feed. A collapsible 5-gallon cube with a spigot pulled up into a tree with the use of a pulley and rope. Five gallons weighs 40 lbs. No big deal but trying to pull a rope over tree bark adds enough friction that a pulley was in order.
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    I use a 2-stage filter. Stage one is a sediment filter - 50 microns. Stage Two is a .2 micron charcoal filter. Most water guys are saying .5 micron will filter out most giardia. The filters are connected with a simple plastic pipe thread with two male ends. I have a surgical tubing to pipe fitting adapter on the Input side. I have a coupler and on/off valve with a pipe fitting to tubing adapter on the output side. I'm using 3/8" ID tubing.

    The water then flows into a 5-gallon water cooler with spigot. My first test filtered the entire 5 gallons in just under 10 minutes.

    [​IMG]
     
  2. bennysbuddy

    bennysbuddy the sultan of swing

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    Are those household water filters that you are using,the kind that they sell at Home Depot ?
     
  3. Trapper Badovinac

    Trapper Badovinac Author, Writer, Photographer

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    I don't know if they sell them at Home Depot, but yeah, they're nothing exotic, just off the shelf.
     
  4. Salmo_g

    Salmo_g Active Member

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    Pretty cool. I think the MSR gravity filter runs about $95 and holds a gallon or two at a time.
     
  5. Trapper Badovinac

    Trapper Badovinac Author, Writer, Photographer

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    The problems I've had with some commercial filters are:
    1. The ones you pump are slow and a pain in the ass for filtering ~15 - 25 gallons/day.
    2. The gravity filters all have specialized single filters you can only buy at certain stores and they clog easily and cost in the $50/range.
    3. They are designed for backpacking so they sacrifice size and weight for volume and filter cost.
     
  6. shrek

    shrek New Member

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    what a great idea. And after initial cost filters are around 15 bucks a set. best value for a camp filter
     
  7. Jerry Daschofsky

    Jerry Daschofsky Moderator Staff Member

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    I'll ask my brother in law what they were doing. They had to make a multistage gravity filter system in Afghanistan. Had to be cleaned daily. Just by time they got in country they used air drops with supplies and water mostly over the filter system. But way he described it, sounded pretty easy.
     

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