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The Outback™ Water Purification System is perfect for emergency preparedness, survival, camping, food storage programs and disaster relief. The Outback™ is a gravity-powered system that purifies water from almost any freshwater source. Rugged and durable, The Outback™ was designed not only for emergency water purification, but also for daily use when municipal water is compromised or where clean, safe water is not available. If you’re looking for a system that is portable, reliable, affordable, simple to operate, and extremely effective in the removal of waterborne micro-organisms and chemicals, check out The Outback™ emergency water purification system.

The Outback Emergency Water System

1Outback™ Features & Benefits

  • Simple: Requires no tools or pumps
  • Saves space: Eliminates need for storing large amounts of water
  • Compact design: stores inside itself with a small footprint
  • Portable: Can be easily transported
  • Durable: No moving parts to break or wear out
  • Practical: Does not require electricity or batteries
  • Easy Setup: Can be assembled and operational in 5 minutes
  • Effective: Removes bacteria, cysts and virus (depending on model)
  • Powerful: Kills viruses including E.coli, Cholera, Hepatitis and Polio
  • Affordable: Produces clean, safe water for about $.09 cents per gallon
  • Capable: Delivers up to 48 gallons of purified water per day (varies with Outback model and source water conditions)
  • Reliable: Effectively treats 1800 gallons of water before filter changes are needed

2Ideal Applications for The Outback™


  • Family emergency preparedness
  • Food storage programs
  • Mission groups
  • Community fire departments
  • Disaster relief or response groups
  • Preppers and off-grid survivalists
  • Corporate campus emergency preparations

3Background & History of The Outback™

The Outback™ emergency water filter is a gravity-powered, two-chamber system that is capable of eliminating harmful bacteria and viruses, including E.coli, Cholera, Hepatitis and Polio, as well as pesticides and other contaminants.

The Outback™ design has been proven effective by rescue, relief and religious organizations in Latin America, Africa, the Pacific Islands, Asia and throughout the world. It is currently used by organizations such as the U.S. Government, Red Cross, Youth Mission, Boy Scouts of America, Samaritan's Purse, multinational religious organizations, NW HardRain Expeditions, and a multitude of community emergency response departments.

4Solution for Water Storage Issues

The Outback™ Resolves Water Storage Issues

FEMA, Red Cross, the Center for Disease Control, and other agencies recommend an emergency water supply of at least one gallon of potable water per person per day. Water bottles take a lot of space, have a limited shelf life and have the potential for leakage.

The Outback™ eliminates the need to store large quantities of water. The system takes up very little space, but can easily purify water for an entire family for the duration of an emergency – or even an extended period of time.

In addition to its’ value during emergencies and natural disasters, The Outback™ is also recognized as a critical component in planning and preparedness efforts prior to a disaster. Many well-planned emergency preparedness, survival and food storage programs now include The Outback™.

5How The Outback™ Works

Diagram of How The Outback Emergency Filtration System Works

The Outback™ filtration process begins when water is poured into the upper chamber of The Outback™.

Stage 1:  The pre-filter net fits over the top of the upper bucket and is designed to remove debris and any large particles.

Stage 2:  The filtration sleeve fits over the filter in the upper bucket. The purpose of this sleeve is to remove contaminants down to 5 microns in size.

Stage 3:   The pleated fibrous purification filter is installed in the upper bucket.  This filter removes waterborne microorganisms such as bacteria, cysts and (in the case of The Outback™ Plus systems) viruses.

Stage 4:   A Multimedia cartridge removes most industrial and agricultural contaminants as well as chlorine, iodine, odors and ‘off tastes’. Note that stage 1 includes an optional stage when using an OB-FF system: The addition of one tablespoon of regular household bleach* or one iodine tablet** will destroy bacteria and virus that may be present in the water. (Follow instructions for specific contact times which may vary based on water quality). This “optional step” is not necessary when using an OB-NF system because the NF7 filter removes viruses, along with bacteria and cysts.

Stage 5: Purified water is ready for use.

*Bleach not provided
**Iodine Tablets sold separately

6The Outback™ System Comparison Chart

Product Description

Outback PLUS (6-12 GPD) Gavity Powered Filtration System

Outback PLUS Mini (6-12 GPD) Gavity Powered Filtration System

Outback (24-48 GPD) Gavity Powered Filtration System

Outback Mini (24-48 GPD) Gavity Powered Filtration System

Part NumberOB-25NFOB-22NFOB-25FFOB-22FF
Price$184.00 $145.00 $167.00 $125.00
Replacement Filter Costs$117.09 $109.91 $83.09 $75.91
Cost Per Gallon of Water Produced$0.07 $0.09 $0.05 $0.06
Water Clarity ImprovementXXXX
Taste and Odor ImprovementXXXX
Chlorine ReductionXXXX
Chemical ReductionXXXX
Virus Removal>99.99%>99.99%--
Bacteria Removal>99.9999%>99.9999%>99.0%>99.0%
E. Coli Removal>99.9999%>99.9999%>99.0%>99.0%
Cysts Removal>99.99%>99.99%>99.99%>99.99%
Cryptosporidium Removal>99.99%>99.99%>99.99%>99.99%
Giardia Removal>99.99%>99.99%>99.99%>99.99%
Storage Capacity (Gallons)5252
Production Rate (Gallons Per Hour)0.50.522
Filter Capacity (Gallons)1,8001,2001,8001,200
Assembled Dimensions12"x12"x24"9"x9"x18"12"x12"x24"9"x9"x18"
Assembled Weight5.94 lbs3.50 lbs5.94 lbs3.50 lbs
Filter TechnologyElectro-Static, Adsorption,  MechanicalElectro-Static, Adsorption,  MechanicalAdsorption,  MechanicalAdsorption,  Mechanical
Power SourceGravityGravityGravityGravity
Country ManufacturedUSAUSAUSAUSA
Ideal Use
  • Emergency preparedness
  • Disaster evacuation
  • Apartments and homes
  • Long-term use
  • Emergency preparedness
  • Disaster evacuation
  • Apartments and homes
  • Long-term use
  • Emergency preparedness
  • Disaster evacuation
  • Apartments and homes
  • Long-term use
  • Emergency preparedness
  • Disaster evacuation
  • Apartments and homes
  • Long-term use
  • Virus, bacteria, and cyst removal
  • High capacity & long filter life (1,800 gal)
  • Extremely low cost per gallon
  • Large holding tank (5 gal)
  • Virus, bacteria, and cyst removal
  • High capacity & long filter life (1,200 gal)
  • Extremely low cost per gallon
  • Holding tank (2 gal)
  • Bacteria and cyst removal (not virus)
  • High capacity & long filter life (1,800 gal)
  • Extremely low cost per gallon
  • Large holding tank (5 gal)
  • Bacteria and cyst removal (not virus)
  • High capacity & long filter life (1,200 gal)
  • Extremely low cost per gallon
  • Holding tank (2 gal)

7The Outback™ Frequently Asked Questions

1. Does The Outback™ provide enough water for a family of 4+?

Yes, both the standard and mini Outback Systems can produce an adequate amount of drinking water for a single user or family/group of 4 people on a daily basis.

2. How many types and sizes of Outback Systems are available?

There are currently four Outback models available:

We also offer a Do-It-Yourself (DIY) kit for those who want to create their own system.

3. What Filters come with the standard Outback™ Systems?

Outback systems contain:

  1. One filter net
  2. One sleeve
  3. Two pre-filters
  4. One multimedia post filter

4. What filters come with The Outback™ Plus systems?

An Outback Plus™ systems contains:

  1. One filter net
  2. One sleeve
  3. Two pre-filters
  4. One multimedia post filter

5. Can you buy extra filters for The Outback™ and Outback Plus™ Systems?

Yes, extra filters are available for sale for all four Outback systems – click here to view replacement filters.

6. Do The Outback™ systems come with an instruction manual?

Yes, all Outback Systems and DIY kits come with the instructions necessary to assemble and use the product.

7. Is it difficult to assemble The Outback™ system?

 No, It takes less than five minutes from start to finish to complete The Outback™ assembly process for any of the four pre-fabricated systems.  The DIY kits will take longer due to material collection and fabrication needed.

8. What type of water source can I use in The Outback™?

It is always best to use water from a freshwater source, when possible.  Typical water supplies that are used with The Outback™ are streams, creeks, rivers, ponds and lakes.  Additional water sources may include rainwater collection, water heaters, swimming pools, spas, water from the toilet and untreated stored water.  The Outback™ CANNOT process salt water/sea water.

9. How much water does The Outback™ produce in a 24 hour period?

The standard Outback has a daily production rate of up 24 gallons per day.  The Outback™ Plus has a daily production rate of 12 gallons per day.

10. Is The Outback™ portable?

Yes, it is as simple as grabbing the handle and going.  This was an important part of the design in the event one was forced to leave their home.  The Outback™ can also act as a source of additional storage for such items as insurance papers, extra medication, power bars, flashlight, matches etc.

11. What makes The Outback™ different from other forms of water treatment systems?

Both its effectiveness and its true portability differentiate The Outback™ from other 'emergency' systems.  From conception, the goal for The Outback™ was to design a utilitarian product that would function reliably in the event of an emergency or when used in undeveloped locations.  The Outback™ was not designed to be an 'attractive kitchen appliance' - but rather a durable, portable, affordable, simple water purification system -- effective in the removal of water borne micro-organisms and chemicals.  Many of the water treatment products and systems currently sold as "Emergency Preparedness Systems" or as systems to be used in undeveloped areas, were never intended for such use and/or work poorly in those applications.

12. Does the water produced by The Outback™ taste good?

Yes, with the high-capacity multimedia Outback post filters, any 'off' tastes or odors are removed before the water enters the lower chamber, ensuring the water is clean and has a pleasant taste.

13. Can I get a system for my home that contains the same type of filtration as The Outback™ systems?

You can.  ESP Water Products uses the latest nano technology filters/filtering systems that work with standard household pressure as well as filters that can handle flow rates of up to 3-4 gallons per minute.  In many cases if you already have a filtration system in your home, there is no need to replace it.  You can simply change out your old filters with the newest filter technology offered by ESP Water Products.  Contact ESP Water Products for more information.

14. How do I know when it is time to replace The Outback™ pre filter and multimedia filter?

Based on years of field trials, it is recommended that the RF05-7 and NF-7 filters (installed in the upper bucket) are replaced every 6 months or when a noticeable reduction in water flow takes place.  The post filters should be replaced after 12 months or at their rated capacity - whichever comes first.  The RM200 post filter is rated for 1200 gallons and the RM300 post filter for 1800 gallons. The pre-filter net and sleeve can be washed and reused and by keeping both items clean or replacing them on a regular basis the recommendation should work for any standard user. When filtering water, always use the clearest possible water source, a settling bucket, and keep the pre-filter sleeve clean. This will help prolong the life and efficacy of the filters.
One of the benefits of purchasing from ESP Water Products is that we will send you a friendly email reminder when your filters are due for replacement.

15. What is the "Nanofiltration" used in The Outback™ Plus system? How does it work?

The most recent water treatment filter media technology used by ESP for the removal of microorganisms such as bacteria, cysts, endotoxins and virus is Nano filtration - a method of capturing microorganisms with an electrostatic charge.  This is where a fibrous filter media carries an electrostatic charge and particles carrying an opposite charge are attracted and adsorbed.  Most particles including pathogens are electronegative in water, so an electropositive filter media is highly effective in attracting and holding the electronegative particles. The fibrous filter media consists of small fibers, two Nanometers in diameter, which are dispersed throughout a cellulose, polymetric, micro glass fiber matrix resulting in a 2 micron pore size filter media.  Since the electro-positive charge of the material provides the mechanism to remove the waterborne pathogens a single layer of the media is able to retain greater than 99% of 0.025 micron size MS2 virus providing an absolute rating of 0.03 microns.  The fibrous filter media is pleated to produce a high surface area filter, suitable for high flow rates with minimal pressure drop.  It can also be formed into a multilayer depth filter capable of filtering virus size particles to greater than a 6 (LTR) log retention value or >99.9999%.

16. What type of material are The Outback™ buckets made from?

The Outback™ buckets are made from food grade High Density Polyethylene plastic (HDPE), which has several applications including food packaging such as milk and snack packs.

17. What is the difference between a cyst, bacteria and virus?

The difference between the three most common pathogenic (capable of causing disease) microorganisms are:
Bacteria: single celled organisms which lack well defined nuclear membranes and other specialized functional cell parts and reproduce by cell division or spores. Bacteria may be free living organisms or parasites.  Bacteria cells range from 1 – 10 micron in length and 0.2 – 1 micron in width.
Cyst: a capsule or protective sac produced about themselves by many protozoan, as well as some bacteria and algae as preparation for entering a resting or a specialized reproductive stage.  Generally 2 - 50 micron in diameter.
Virus:  a parasitic infectious microbe, composed almost entirely of nucleic acid, which can cause disease(s) in humans.  Viruses can only reproduce within living cells.  They are 0.004 – 0.1 microns in size about 100 times smaller than bacteria.

18. What is a settling bucket and when should I use one?

A settling bucket is recommended when the untreated water supply contains a large amount of fine silt and sand.   By collecting the untreated water in a bucket and then allowing it to 'sit' for a period of time, sediment, dirt and fine particles will settle to bottom of the bucket.  The clear water can then be poured into The Outback™ System.  This will minimize the amount of debris that is poured into The Outback™ system and help protect The Outback™ filter from premature clogging or 'exhaustion'.


What makes a water system a 'purifier' instead of a 'filtration system'?

 Proven performance.  To be considered a 'purifier' a water treatment system must effectively remove microorganisms to an US EPA standard of 99.9999 % for bacteria, 99.9% for cysts and 99.99% for virus.

Do any of The Outback™ Systems qualify as purifiers?

Yes, both the Mini-Outback Plus™ (OB-22NF) and the full sized Outback Plus™ (OB-25NF) systems meet EPA's purifier standard using the NF7 filter (Nano filtration).  The Mini-Outback (OB-22FF) and the standard Outback (OB-25FF) can function as purifiers but require the assistance of either a chlorine or iodine additive to meet that standard.  The Aquamira Water Treatment Drops are a great combination with the standard Outback system to provide purified water.

Do The Outback™ Systems effectively remove bacteria?

Yes, all of The Outback™ Systems effectively remove bacteria at a rate of greater than 99%. The Outback™ Plus removes bacteria at a rate of greater than 99.9999% - thus meeting the US EPA for bacteria removal.

Do The Outback™ Systems effectively remove cysts?

Yes, all of The Outback™ Systems effectively remove cysts at a rate of greater than 99.99% -- exceeding US EPA standards.

Do The Outback™ Systems effectively remove virus?

Yes, The Outback™ Plus systems (OB-22NF and OB-25NF) use "Nano Filtration" technology to effectively remove virus at a rate of greater than 99.99%.  The standard Outback Systems (OB-22FF and OB-25FF) will only remove virus with the assistance of chlorine or an iodine additive – see options here.

Do The Outback™ Systems remove chemical contamination?

Yes, all of The Outback™ Systems use a mixed blend combination of carbon (multimedia) that is formulated to remove a long list of organic contaminants.

Will The Outback™ system remove salt from the water?

NO, The Outback™ will not remove salt from the water.

What does it mean when it says a filter is 'bacteriostatic'?

Bacteriostatic means a filter (or the material used) has the ability to inhibit the growth of bacteria without destroying the bacteria.  For example a bacteriostatic cartridge will reduce bacterial colonization activity on the filter but will not eliminate it.

Is either the RF05-7 or the NF-7 'Nano filter' (used in The Outback™ Plus system) bacteriostatic?

Yes, both of these filters are bacteriostatic -- which means any bacteria captured by the filter does not have the ability to multiply.  This is important because eliminating the bacterial growth reduces the 'work' that the filter must do to remove bacteria as water flows through it - prolonging the life of the filter.

What makes a water system a 'purifier' instead of a 'filtration system'?

 Proven performance.  To be considered a 'purifier' a water treatment system must effectively remove microorganisms to an US EPA standard of 99.9999 % for bacteria, 99.9% for cysts and 99.99% for virus.


How long has The Outback™ system been used to treat water of questionable quality?

For over 20 years. The original Outback Systems were sold primarily to relief organization for use in countries outside the United States. These systems have been used by organizations throughout the world to provide drinking water using contaminated water sources. What is considered the 'domestic version' of The Outback™ was made available to the general public in 2001.

Who uses The Outback™ systems?

The Outback™ is used on a daily basis by some of the largest disaster relief and faith-based organizations in the world as well as by a myriad individuals and small groups.  Most use The Outback™ as their only method of water treatment.  The Outback™ has also frequently sold as a stand-alone emergency preparedness product due to its reliability, portability, effectiveness, ease of use, and its affordability.

Is it really necessary to worry about removing virus?

YES.  There are multiple studies indicating the presence of viruses in groundwater.  For example the most recent study taken from the Minnesota Pollution control agency, showed that 24% of all samples taken from the faucets in people's homes were virus positive.  These viruses come from human fecal matter, are negatively charged, and can be transported through the soil.  This study showing groundwater containing viruses disproves the common belief, that "ground water is pure and pristine". For the complete study go to .

Has The Outback™ been tested by an independent certified laboratory?

YES, multiple times.  The Outback™ Systems have been tested multiple times by two different certified, third party, independent laboratories - one located here in the United States and the other  - the only WQA - USA recognized Laboratory in India and the first WQA recognized lab in South Asia. The Lab is accredited by NABL for Drinking Water analysis as per ISO/IEC 17025.  


Is it mandatory to flush The Outback™ system prior to initial use?

It is not necessary but it does help to flush any carbon fines that may be present in the multimedia post filter.

Are carbon fines or particles harmful?

The carbon particles or fines are not harmful if ingested.

How big is The Outback™ system?

The dimensions are as follows:

  • The standard size Outback system with 2 gallon upper and 5 gallon lower containers - unassembled size = 12” x 12” X 15”; assembled size = 12” x 12” x 24”.
  • The mini version Outback system with 2 gallon upper and lower containers - unassembled size = 9” x 9” x 10”; assembled size = 9” x 9” x 18”.

How much does The Outback™ system weigh?

When not in use the system weights are as follows:

  • Outback Mini weight is 3.5 lbs.  When in use and the lower bucket is full, it weighs approximately 20 lbs.
  • Outback Standard weight is 6 lbs.  When in use and the lower bucket is full, it weighs approximately 45-48 lbs.

What is the storage life of The Outback™ and The Outback™ filters?

The Outback™ Systems and filters have an indefinite shelf life if filters are left in original packaging, remain stored inside The Outback™ and the systems is not stored in direct sunlight.

Can you clean The Outback™ system filters?

NO.  The Outback™ filters were purposely designed so that they could not be cleaned. A great concern is that cleaning a filter that is contaminated with a high percentage of a pathogenic microorganism leaves the individual at high risk of contaminating themselves causing illness


How does The Outback™ compare to other methods of water treatment systems?

A general comparison and discussion Comparisons are always difficult.  What research has shown is, in the event of an emergency, "simple, reliable and effective" are the key elements required in any device on which you must depend -- be it a stove, water filtration device or your food supply.  We believe that this is the reason so many private and government organizations have elected to use The Outback™ as their system of choice. There are product manufacturers claiming their products are used by NASA or Special Forces in Iraq, or hikers and backpackers while they scaled Mount Everest.  Who knows, maybe those claims are true.  But it is important to remember we (most) are not astronauts.  We are not' special forces' soldiers and we are not members of that small percentage of the population who go on unimaginable expeditions.  We are fathers, mothers, adults and children who get up every day and go to work and school and hope and pray that our families will never be forced to face a devastating disaster.  We watch and read the news and see it happen to others - and hope it will never happen to us.  However, in the event we do face such a challenge, we want to prepare as best as we possibly can.  As a part of that preparation we want a water system that any member of the family can operate -- one that is simple, effective and reliable.  The Outback™ Systems meet this need.  Evidence of this is the fact that, when asked by the Department of Home Land Security  (DHLS) (in the aftermath of Katrina) to design and provide a water treatment system that could be used by the average American consumer in the event of a disaster, a mini version of The Outback™ was their product of choice.

Are The Outback™ filters better than ceramic filters?  What are the differences?

The Outback™ filters are different than a ceramic filter in several ways, both in the way that they handle various contaminants and in their use and lifespan: VIRUS:  The Outback™ Plus filter (NF7) effectively removes viruses. A ceramic filter does not.  Even the standard Outback filter (RF05-7) can be used in conjunction with Chlorine or Iodine to remove viruses.  A ceramic filter cannot be used in this manner without quickly exhausting it.  (The amount of media inside a ceramic filter is small when compared to the media in The Outback™ ™'s multi-media cartridge and would quickly be exhausted when burdened with the removal of Chlorine or Iodine.)
BACTERIA:  Most ceramic filters have a bacteria removal rate of 99.99 %, The Outback™ Plus has a rating of > 99.9999%.   The standard Outback filter has a removal rate of 99.99% - which may look the same as the ceramic removal rate however it is tested at a much higher standard than ceramics are tested.  The 'real' removal rate is much higher (further discussion about this below).
DURABILITY:  A ceramic filter is very fragile and if dropped will break. Neither The Outback™ RF05-7 or NF7 will break or crack when dropped.
LONGEVITY: Most ceramic filters contain a carbon core and once the carbon is exhausted the filter no longer has the ability to remove organic matter from the water supply.  Exhausted carbon can become a breeding ground for bacteria and actually increase contamination in the water. The Outback™ uses a large capacity independent multimedia cartridge which provides a much greater capacity for the removal of organic and chemical contamination - separate and apart from the bacteria and/or virus removal filter allowing for replacement of this less expensive filter independently and as needed.
EFFECTIVENESS: The Outback™ system is tested using both GTW 1 and GTW 3  test water - challenges for general water filtration and purification systems simulating extreme real-world conditions, ceramics are tested using distilled water that has been inoculated with a pre prescribed amount of a specific microorganism. In short, The Outback™ is passing a much more stringent test protocol than the ceramic - and still out-performing it.

What is GTW mean?  What is the difference between GTW 1 and GTW 3 test water?

 GTW (general tap water) & 3 indicates the characteristics of the water used by a laboratory when it is testing a water treatment system for effectiveness.   Most water treatment systems tested never face the rigid specifications of GTW 1 or GTW 3, but rather testing is conducted using distilled water inoculated with a specified microorganism.  The Outback™ is tested against both standards GTW 1 and GTW 3 with GTW3 offering a much more difficult concoction of contaminates such as levels of pH, temperature variations turbidity levels, TOC and levels of TDS than GTW 1.  In addition The Outback™ is cycle tested, which means at predetermined times during the testing process the testing stops for 48 hours and the system being tested is left to rest with no water passing through the filters.  During this period of rest the challenge micro-organism builds up on the filter so that when the testing is resumed does the filter allow a large amount of the microorganism to migrate through the filter.  The Outback™ showed no such break through.

How can The Outback™ system produce so much water through a gravity powered process with so little pressure to push the water through the filters?

The filter design of The Outback™ Systems have very high hydrophilic properties.

What does hydrophilic mean?

Hydrophilic is having the characteristic of absorbing water. Example: Cotton is a hydrophilic fiber.  Many filters contain hydrophobic characteristics which repels water, for them to work there must be a certain amount of pressure to push the water through the filter medi .  Example: Nylon is a hydrophobic fiber.

Do you have to use any chemicals with The Outback™ Systems for them to be effectively remove bacteria, cyst and virus?

The Outback™ Plus needs no chemical additives to remove bacteria, cyst and virus.  The standard Outback is very effective in removing bacteria and cysts without the use of any chemical additives.  Chlorine or Iodine can be used with the standard Outback if virus removal is desired.

What do 'nominal filtration' and 'absolute filtration' mean?

These terms refer to the approximate size particle, the majority of which will pass through a filter, based upon its rating.  The rating is usually in a micron size.  A nominal filtration rating is generally interpreted as meaning that 85% of the particles (the size of its rating) will be retained or 'stopped' by the filter. An absolute filtration rating states that 99.9% or essentially all of the particles (larger than a specific micron rating) will be trapped on or within the filter.

In the event of an emergency can you recycle your own urine through The Outback™?

Healthy urine is not toxic. However, it contains compounds eliminated by the body as undesirable, and can be irritating to skin and eyes. After suitable processing it is possible to extract potable water from urine. The US Army Field Manual advise against drinking urine for survival. These guides explain that drinking urine tends to worsen, rather than relieve dehydration due to the salts in it, and that urine should not be consumed in a survival situation, even when there is no other fluid available. In hot weather survival situations where other sources of water are not available, soaking cloth (a shirt for example) in urine and putting it on the head can help cool the body.


Has ESP produced other water purification systems?

Yes, the HLS-1 gravity powered water purification systems was developed in response to a Source Sought solicitation by the national protection center (NPC) of the U.S. Army Natick Soldier Research Development and Engineering Center.  The NPC was sponsored by the Department of Homeland security to identify or develop a near term solution for a personal  portable water purification system that was low cost, easy to use, had a long shelf life and could pass NSF P248 (Emergency Military Operations Microbiological Water Purifiers).

Do you ship The Outback™ to customers who live outside the United States?

Yes, The Outback™ Systems are shipped to customers throughout the world.

What is the warranty on The Outback™ and The Outback™ components?

The Outback™ Systems are covered under a normal use one year warranty.

Where are The Outback™ components and systems made?

 All of The Outback™ components are made in the United States except the pre-filter net and sleeve, which are made in Ontario Canada

Where are The Outback™ Systems assembled?

The systems are assembled, packaged and shipped from Eugene, Oregon.

Is there a patent on The Outback™ system?

Yes, there is currently a patent pending on The Outback™ Plus systems.

How long has ESP Water Products been in business?

ESP Water Products has been in business since June of 1991.

Why Buy from ESP Water Products

Since 1991, ESP Water Products has committed to staying at the forefront of innovation in water filtration and emergency water purification. We offer a wide variety of emergency water filters for individuals, small groups/families, and large groups/communities. We're also proud to carry one of the largest online inventories of membranes, filters and replacement parts to keep your system in top shape. Here are a few reasons you can shop with confidence at

  • Experience in water filtration & purification industry since 1991
  • We’ve curated the options out there to bring you the best
  • Competitive pricing on top-quality systems
  • One of the largest online selections of Emergency Water products and their replacement parts/filters
  • Excellent customer support

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