• Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • Start Here
  • Survival Essentials ↓↓
    • Survival Food
    • Survival Gear
    • Self Defense
  • Survival Situations ↓↓
    • Natural Disasters
    • Man Made Disasters
    • SHTF & Societal Collapse
  • Wilderness Survival
  • Prepping
  • About

Secrets of Survival

When Disaster Strikes, Be Prepared for Anything

You are here: Home / Prepping / How to Make Emergency Water Filters

How to Make Emergency Water Filters

Updated on August 21, 2020 - Article by Russ Michaud

Surviving A Water Crisis

Water problem solved: Learn how to build a ceramic and carbon water filter for only $25 in parts, capable of filtering 10 – 15 gallons of water per day to produce clean drinking water. Simple water filter systems used in third world countries and disaster relief.

Are you prepared for a serious water crisis in the days or months ahead?

Producing clean drinking water is the solution to a water crisis. Why? Because contaminated water is dangerous to humans; it sickens populations and many people can die a miserable death from a water born pathogen or poison, that they could have otherwise filtered out, if they had knowledge before hand.

What Is Going On?

There is a feeling in the country that things are changing for the worse; the government is deep in debt, politicians are just looking out for themselves, and society as a whole is beginning to fray. For a variety of reasons it appears that the good old days are winding down and harder times are coming. A lot of folks look at our high-tech lifestyles and realize that if critical functions were removed they would be utterly helpless to fend for themselves. Living without the internet seems unimaginable to many; just think if they lost electricity, or grocery stores, or running water…

Being Prepared For A Crisis

As the bad news continues to come in there are a lot of folks preparing for a life without some or all of our modern conveniences. There’s a variety of books, blogs, and TV shows discussing how this might be possible. Of course there are many unknowns when planning for disaster, such as what happens, how long it lasts, your living situation, location, and financial circumstances. One thing that you will always need, no matter what happens, is access to clean water. Even a disaster that only lasts for a few days could become deadly if it leaves you without water.

DIY Emergency Water Filters

This article introduces ceramic water filter cartridges, which provide a low-cost, low-tech, well proven solution that enables clean water to be produced from just about any fresh water source.

What Is A Ceramic Water Filter?

ceramic-water-filter

The filter consists of a ceramic shell which usually contains activated carbon (we have an article about how to make activated charcoal/carbon if you’re interested). The ceramic shell has sub-micron sized pores which filter out small contaminants such as bacteria and particulates while the carbon inside treats the water by removing a wide spectrum of chemicals. Specialized filters that remove particular chemicals such as fluoride or arsenic can also be manufactured by using other media in place of the carbon.

stockpiling challenge

Low Cost Water Filtration Used In Third World Countries And Disaster Recovery

These filters are fairly low cost but are often bundled with fancy containers and big brand names that can add hundreds of dollars to the price. In reality though, you can make your own water filter systems at a much lower cost. This has been proven by missionary groups and NGOs in disaster situations all around the world.

Two pictures are presented below (in lieu of a few more pages of text) to explain how these systems can be made and used. The picture on the left is made from a couple of 5 gallon buckets with the filter in the middle. Though you can use any type of containers when building your system, the basic design is almost always the same: A top container holding the unfiltered water and the filter, and a bottom container to catch the clean water that drips from the filter spout. The picture on the right shows the parts that make up an ’emergency kit’ which is used to create the system at left. Currently this kit sells for only $25.

emergency-water-filters

water-filter-kit

These systems are portable, require no power, are very simple to create and maintain, and are low cost.

They can be used with just about any freshwater source as has been proven throughout the world for the last couple of decades by a multitude of refugees.

How Much Water And How Fast?

One of the first questions most people have is “How much water are these filters good for?” There are two answers for this question. The filter will remove bacteria and particulates for as long as the ceramic shell is intact. The pores in the ceramic can get clogged over time, but it is easy to unclog them by using a slight abrasive to remove the outermost (clogged) layer of shell.

Chemicals are treated by the activated carbon inside which is used up after 6 to 8 months of ‘normal’ use. ‘Normal’ assumes 12 to 15 gallons per day from a natural water source. This implies the carbon will last for 3000 to 4000 gallons. The carbon’s lifespan will be shortened if the water contains a lot of chemicals, such as chlorine. The filters can be stored indefinitely and used intermittently provided they are dried out well inbetween uses.

A 5 Gallon Bucket Can Produce 12 To 15 Gallons Per Day

The amount of clean water a system can produce in a day is another question most people have. The water flow of a filter dripping out of the spout depends on the water level in the upper container, so as the water level decreases the flow rate slows. For a standard 5 gallon bucket the flow rate is 12 to 15 gallons per day assuming the bucket is refilled a few times. This is plenty of water for drinking and basic needs for a family. However, one can easily increase the flow rates if larger groups or bartering applications are needed.

three-dome-filters

A very simple method to increase flow rates is to place filters in parallel. For example; if one filter is giving a flow of 1/2 gallon per hour, placing a second filter in the container will double the flow rate. (A standard 5 gallon bucket can fit up to three dome filters). Another advantage of parallel filters is there is more activated carbon so you can remove more chemicals. The downside to this method is that it costs more to implement.

Increase Water Flow By Increasing The Pressure On The Filter

A second method for increasing water flow is to increase the pressure on the filter. This can be accomplished by using deep upper containers to provide more water pressure, or by increasing the air pressure in the container using an air tight seal and a hand pump. The downside of air pressure is that it increases system costs and also requires manual labor.

stockpiling challenge

Add A Siphon Tube To Produce A “Pulling Force”

stacked-bucket-system-water-filter

A third method that is low cost is to add a siphon tube to the output of the filter. This provides a pulling force instead of a pushing one.

Are You Prepared for a Worst Case Scenario?
secrets of survival newsletter The first 72 hours after a disaster are the most critical for survival. Enter your email below to get a checklist of essential items you need in your 72 hour emergency get home bag…
loader

(This is the same mechanism used for siphoning gas)

The force is proportional to the length of the siphon and the vertical distance it is from one end to the other; the longer the tube the faster the water flows.

For a stacked bucket system (where one bucket sits directly on top of the other one, and the vertical distance is only a foot or so) the siphon can double the flow compared to a filter just dripping.

A ‘separated bucket’ system (shown to the right) uses a long siphon; this can increase flow rates a lot more depending on the siphon height. Please note that if you separate the buckets like this, the bottom one should stay covered to prevent other contaminants from getting into the filtered water. This method is probably the best due to its low cost and low effort required.

Word Of Caution On Flow Rate

There is a caveat to increasing flow rates and that is that it decreases the ‘contact time’ that the water has with the activated carbon and thus reduces the ability of the carbon to adsorb some chemicals. The time needed varies with the type of chemical being adsorbed so unfortunately there is no straightforward answer as to how fast you should go. The best advice is to filter the water however quickly you have a demand for it.

These Water Filters Can Be Used In Many Applications

These filters are adaptable to many applications and configurations. They are used in rain water systems, well water remediation, and back country living as well as disaster situations. Besides tens of thousands of refugees, farmers in Uganda, apartment dwellers in NYC, and water vendors in Central America have all used these filters successfully.

One additional benefit of these filters is their potential value as barter items if times do get really bad. Something fairly inexpensive now could be worth a whole lot more later on, especially if they’re useful.

Ceramic And Carbon Water Filters Are Excellent Devices For Families And Small Groups

Ceramic and carbon water filters are low cost, do not require electricity to operate, and are simple to assemble and maintain.

They work on both biological and chemical contaminants in water sources where many other filter types only work on one or the other.

In Do It Yourself applications they provide an outstanding value and allow for a wide degree of customization. They can also provide a form of investment as they would enable bartering for other valuable goods and services in ‘grid down’ scenarios.

Homespun Environmental is a small business catering to the DIY ‘prepper’ market for ceramic water filters. DIY (Doing it yourself) allows for much lower prices and simple water filter systems that can be customized to particular circumstances and needs. They offer individual components, affordable, emergency water filter kits, and systems for the outdoor sportsman.

Our Top Posts About Prepping

emergency essential survival supplies Essential Emergency Supplies to Survive Any Disaster
Secret-Stockpile Survival Stockpile: Your First Steps To a 1-Year Stockpile (While There’s Still Time)
prepping Prepping: Survival Planning & Doomsday Prepping

More Information about Essential Prepping Resources and Supplies

Essential Emergency Supplies to Survive Any Disaster

Survival Stockpile: Your First Steps To a 1-Year Stockpile (While There’s Still Time)

The Top 10 Prepper Supplies

Survival Prescription Medication and the Apocalypse – You Have Every Right to Worry

Rainwater Harvesting – How to Prep for Water Shortages

The Top 10 Survival Supplies

10 Best Water Filtration Systems

Are You Prepared for a Worst Case Scenario?
secrets of survival newsletter The first 72 hours after a disaster are the most critical for survival. Enter your email below to get a checklist of essential items you need in your 72 hour emergency get home bag…
loader

Why You Can Trust Us

Secrets of Survival has been around since 2002 (almost 20 years) and our survival knowledge is the real deal. We were writing and discussing survival and prepping before people even knew what the word “prepping” meant. We also preceded the trendiness of survival media nowadays… for example, we were arround before Bear Grylls filmed his first episode of Man vs Wild.

Our contributors and writers over the years have included survival experts of all stripes – including a Green Beret Special Forces Medic, a former Navy SEAL, a leading survival instructor who’s been featured on National Geographic and PBS. Every article is either written or reviewed by someone who is an expert in either survivalism, prepping, or homesteading (or all three) and our goal is to be as practical and educational as possible.

While some of our writers and contributors use pseudonyms in order to protect their privacy (never a bad idea in these times where out of control surveillance is a growing problem), you can trust that everybody who gets to write for us has been vetted for their knowledge and passion when it comes to survival.

Click here to learn more about Secrets of Survival and our writers and contributors.

Filed Under: Prepping

Reader Interactions

Comments

  1. Safe Life Technology says

    December 9, 2019 at 4:10 am

    That’s we need to know, it;s a great technique

    Reply
  2. hanaan says

    December 19, 2019 at 7:01 am

    i tried combination of charcoal and ceramic it works great

    Reply
  3. Seolearnbd says

    March 13, 2020 at 6:24 pm

    Sand and grass can also be used in this first stage. Fill the bottom with about 3 inches of grass clippings to filter out larger particulates and help give water a clean taste from chlorophyll contained in the grass. Then fill with 3-4 inches of very fine sand.

    Reply
  4. Medicaltipes.Com says

    March 24, 2020 at 9:41 pm

    Use scissors or a knife to cut off the bottom part of the bottle you will be putting the filter material in.

    Reply
  5. APKun says

    April 22, 2020 at 5:19 pm

    Add a 2-3 inch layer of the finest sand you can find. This and the subsequent layers you will add are to filter out particulates in the water.

    Reply
  6. Worries says

    April 23, 2020 at 2:40 am

    In an emergency, water contaminated with germs can often can be made safe to drink by boiling, adding disinfectants, or filtering. IMPORTANT: Water contaminated with fuel or toxic chemicals will not be made safe by boiling or disinfection. Use bottled water or a different source of water if you know or suspect that your water might be contaminated with fuel or toxic chemicals.

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Our Top Posts About Prepping

emergency essential survival supplies Essential Emergency Supplies to Survive Any Disaster
Secret-Stockpile Survival Stockpile: Your First Steps To a 1-Year Stockpile (While There’s Still Time)
prepping Prepping: Survival Planning & Doomsday Prepping

More Information about Essential Prepping Resources and Supplies

Essential Emergency Supplies to Survive Any Disaster

Survival Stockpile: Your First Steps To a 1-Year Stockpile (While There’s Still Time)

The Top 10 Prepper Supplies

Survival Prescription Medication and the Apocalypse – You Have Every Right to Worry

Rainwater Harvesting – How to Prep for Water Shortages

The Top 10 Survival Supplies

10 Best Water Filtration Systems

lost remedies

Our Top Posts About Prepping

emergency essential survival supplies Essential Emergency Supplies to Survive Any Disaster
Secret-Stockpile Survival Stockpile: Your First Steps To a 1-Year Stockpile (While There’s Still Time)
prepping Prepping: Survival Planning & Doomsday Prepping

Footer

Amazon Affiliate Disclosure

Secretsofsurvival.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.

  • Terms of Service
  • Privacy Policy
  • Disclaimer
  • Contact Us

FREE Get Home Bag Checklist

The first 72 hours after a disaster are the most critical for survival. Enter your email below to get a FREE checklist of essential items you need in your 72 hour emergency get home bag… Plus life-saving survival tips and techniques.

loader