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Understanding Water Filtration - MUST READ

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  • #31
    We have the Sawyer filters and a Katadyn. We also have Life Straws, Iodine tablets, and Bleach. I always thought boiling and bleach would do the job. Am I being naïve? We have several methods of boiling even if there is no power. I like to think I am prepared, but open to suggestion if I am missing something.
    The only place success comes before work is in the dictionary.

    Everything happens for a reason. Sometimes the reason is you are stupid, and make bad decisions.


    • #32
      We also have several ways to purify water for drinking.. That is one thing I made sure of long ago. Something that everyone should now be taking a look at for longer term use.


      • #33
        Boiling will kill all bugs, but it will not remove lead and such. or certain pesticides, chemicals. oil products or radiation. In fact boiling tends to concentrate these.


        • #34
          Been trying to go through some things that was stored way back in a closet for a long, long time in a card board box. I had forgotten about these things. Hubby helped me get the box out so I could go through it. I had some camping stuff as well as 4 seychelle water straws and 2 of the water bottles. They are dual-chambered extreme water filter straws for removing radiation from water. I had forgotten all about these. Had to go on line to find out how good they were. Seems to be very good ones. So I guess they are keepers. I am trying to get all my water filters, iodine tabs, and such together in one place with my berkey filters. I have a 6 gal bucket to set all these in so I can keep them together and be able to grab them when needed. I have sawyer straws and life straws also that I am getting together. I feel that this is the time to make sure of our inventory and that we have everything in order. We already did it with the food so now it's time for all the non food items such as the water filters, etc. Then I will know what to do better from there.


          • #35
            Purchased a Reverse osmosis water filter, price is reasonable, professionals staff is very informative and not pushy. I would highly recommend osmosis water filter.Recently I am using water filtration services by KayPlumbing Services. They have an online website ou can also visit


            • #36
              What are domestic reverse osmosis systems like these days ?

              I had to tend the two big glass water stills and the several RO units in our labs.
              The former just needed their 'kettle' elements de-scaling and a really good scrub, but the latter required a heap of consumables.

              Pre-filter, DI pack, membrane module, UV steriliser, single-use gaskets etc etc. Other than the DI pack, which just required a salt flush, none of the rest could be re-furbished on-site...


              • #37
                Using a RO purifier is always a good choice at home but it is impossible in wild, tips shared here are great.
                Last edited by Buggyout; 04-08-2020, 11:21 PM.


                • #38
                  We have a rain water capture system of which the water, as it comes out our metal roof is purified through Berky black filters...


                  • #39
                    Filtration is all very well when you have plenty of fresh water to filter, but what happens when all you have is gloopy mud, soggy sand or wet gravel?

                    What do you do when all there is is a bunch of scrub and some Cacti or Agave plants? Filters are useless then!

                    And what if your at the coast and all that's available for twenty miles is salt water?

                    That, my friends, is when you need an Estil...

                    Estil is the world's first multifunctional emergency survival water purification device capable of being adapted to the situation in which you find yourself. Constructed in extremely tough silicone rubber, Estil is almost indestructible and packs down to a lightweight, pocket-sized package.

                    In Solar Still mode, it works by harnessing the Sun's energy to evaporate fresh water from any wetted material, be it mud, sand, gravel or succulent plant flesh. Just form a mound of whatever wet material you have available and place the Estil over it, the process of ambient distillation shall begin generating a subsistence quantity of fresh water... sufficient to keep you alive.

                    In cooler temperatures, Estil can be used as a vessel for melting ice and snow or boiling water- just hang the inverted device over a fire using the four reinforced holes provided or nestle it neatly into a suitable hollow in the ground, throw in a few hot rocks from your firepit and you'll be supping down hot broth in no time!

                    But the advantages don't stop there...

                    Estil is shaped to fit neatly upon the head, so a user could simply apply a wet cloth to their scalp and fit the Estil over it. This has several advantages-

                    a) it protects your head from the worst of the Sun's radiation, keeping you cool and alert in hot climates,
                    b) it augments the process of distillation by using some body-heat to drive the evaporation process,
                    c) it leaves your hands free to tackle other important survival activities.

                    It might be uncomfortable, but at least it keeps you alive!

                    Estil is the world's first and only multifunctional water desalination and purification device and is coming to an outlet near you soon!

                    This is not quite correct:


                    Distillation is often thought to render all water safe. In effect water is heated to the point of evaporation and the steam gathered and condensed. The heating action will kill all micro organisms and many chemicals (with a lower boiling point than water) will be left behind and not come across in the distillate. It is a fuel heavy and mechanism to produce large quantities of fresh water although a variety of techniques (including the “solar still” and “connected bottles” will produce small quantities in extremis). It is worth noting that some chemicals (e.g. methanol) have a lower boiling point than water and can come across in distillation.
                    The facts:

                    Solar Stills are distillation units that operate purely by the process of ambient distillation. Meaning they work at normal daytime (and night-time) temperatures.

                    They require NO ADDITIONAL POWER SOURCE other than sunlight and the ambient surrounding temperature to adequately purify water. It is not the heat that purifies the water but the very action of evaporation, which removes 99.9% of organisms from the water.

                    Additionally, even if your still is powered, you don't need to force the process by ramping up the temperature to boiling point. Ambient distillation begins at 0.1 degrees Celsius (the triple-point of water).

                    Yes, that's one tenth of one degree above freezing! They are at their most efficient at temperatures just above ambient. So you can perfectly adequately distill your water with a very low flame indeed!

                    Solar Stills come in all shapes and sizes and can be made at home very cheaply. See Facebook page "Solar Still Technologies" for suggested designs.

                    Estil is designed for survival emergencies where pooled water is scarce.

                    Estil on Cacti
                    Last edited by Estil_Official; 03-24-2023, 05:30 PM. Reason: Added the detail about low-temperature purification.
                    Estil: Adapt... survive.