Why LifeSaver Water Purifiers are Worth Paying More For

Why Do LifeSaver Water Purifiers Cost More?

Back in 2018 we published a blog on 'How to Choose a Water Purifier', explaining the different technologies on the market and the terms used by those promoting them. There are now more choices available than ever before, so we thought now is a good time to review the information we put out there, and to look at what has changed. And what hasn't. 

Why should I buy a Water Purifier?

Put simply, the consequences of drinking contaminated water can be life threatening. And if you are out and about - exploring, hiking, camping, overlanding or living off-grid - without access to a safe drinking water source, it would be foolhardy to believe that any wild water is safe to drink. And in many countries the same can be said for the tap water.

Unless you walk around carrying a water quality testing kit at all times, you can never really know for certain what is in the water you’re drinking. The thing about bacteria, protozoa (cysts), parasites, viruses and microplastics is that you can’t see them! The safest thing to assume is that an unknown water source could have anything in it.

There are now hundreds of products on the market that claim to filter or purify water, all claiming to make it safe to drink. The scary truth is, this industry is STILL unregulated. A manufacturer can make any claims about their products that they want to, they don’t even need to have their products tested!

Six Important Questions

To make sure you aren’t caught out and can make an informed decision, here are six essential things you should know. 

1. What is the difference between a portable water purifier and portable water filter?

A water purifier removes, kills or inactivates all types of disease-causing micro-organisms, such as bacteria, viruses and protozoan cysts, making water safe to drink.

A portable water filter only removes bacteria and protozoa, but NOT viruses, which are far smaller. You would likely get very sick using a water filter to treat water which contains virus.

So it’s fair to say water purifiers are a safer option than water filters.

2. What standards do manufacturers need to meet in order to sell a portable water filter or purifier to the public?

None. There is nothing stopping someone from making a water filter out of an old sock, claiming it rids the world of disease and selling it to the masses. The ‘portable water filtration’ industry is completely unregulated and as a result, there are many embellished, misleading and unfounded claims made.

So don’t trust everything you read.

3. What should you look for to know if a product can be trusted?

The most important thing to look for is evidence of credible testing. The manufacturer should have a ‘certificate of testing’ for each product in their range, demonstrating they have met appropriate standards. The testing certifications should be available to view on their website (preferably) or upon request. Ask yourself this, if a company has tested their products, why wouldn’t they show the results?

So manufacturers should show that their products are tested to appropriate standards.

4. What are appropriate standards for water purifiers to be tested to?

This is the crux of the matter, and where the following knowledge can keep you safe. 

The EPA (Environmental Protection Agency) Guide Standard Protocol was written in 1987 for testing microbiological water purifiers. This became the gold standard, determining what level of reduction of virus, bacteria, and protozoa is needed before water is safe to drink. The next organisation to throw their hat into the ‘drinking water standards’ ring was NSF (National Sanitation Foundation), who produced their own recommendation, the ‘NSF P231 microbiological water purifiers protocol‘. This is based on the original EPA guidelines, but gets revised more regularly, allowing for new technologies and organisms for testing with.

The full NSF P231 protocol requires tests be carried out on two different types of water over an 11 day period (or the life of the filter, whichever ends first). For the first six days, the filter is tested with General Test Water (Type 1). This is just ‘spiked tap water’ – designed to test how the filter would cope with viral and bacterial contamination in your tap water supply. This should be a breeze to pass.

The real challenge comes in the final five days, when the Type 1 water is replaced for Challenge Test Water (Type 3). This Type 3 water is dirty, cold, PH adjusted, has dissolved solids and organic matter mixed in, and of course includes plenty of viruses and bacteria! It’s designed to represent the worst case scenario you could come across in the real world. It’s practically sewage water. 

Worryingly, most water filters and purifiers sold online, cannot complete the second half of the NSF P231 protocol with the Type 3 Challenge Test Water. Therefore, most products out there haven’t actually tested to the real-world standards that you will be using them in!

Now here’s where things get even murkier. Some manufacturers claim to meet or exceed EPA guidelines & NSF P231 standards. However, they have only completed the Type 1 water phase of the protocol, they haven’t completed the Type 3 stage of the 11 day test. For example, there’s actually one other water purifier brand who show their testing certificate online, and their certificate states that the test was only carried out on 1 litre of water! So no one knows how effective that product is beyond that first litre!

Also look out for filters or purifiers claiming to meet ‘NSF 42 & 53’ standards. These standards are for ‘health and aesthetic taste effects for RESIDENTIAL water filters’. All this test proves is that they are suitable for filtering water from the tap in your home to make it taste better. They will not remove bacteria or viruses!

So the NSF P231 standard is the only test worth its salt. It’s very difficult to pass, involving 11 days testing with Type 1 and then Type 3 waters. That is the standard your purifier should be tested to and meet. If there is no mention and evidence of NSF P231 or EPA guide testing, question why.

5. Which competent laboratories can be relied upon to test water purifiers to the required standards?

Testing should always be done through an external independent Lab. The lab should be ISO 17025 accredited, ensuring it is competent and follows best practice. Here are some labs which meet this criteria and have the relevant experience with testing drinking water.

• NSF (National Sanitation foundation) Ann Arbor, Michigan, USA
• BCS (Biological Consulting Services) Gainesville, Florida, USA
• Biovir Laboratories California, USA
• WQA (Water Quality Association) Illinois, USA
• SGS Worldwide locations
• Multiple University laboratories worldwide (with relevant faculties)

So if the Laboratory referenced in a testing certificate isn’t one of the above, perhaps do some further digging to ascertain its credentials.

6. What other considerations are there when it comes to the safety of a water purifier? 

By now you know, if a product claims to be a water purifier, it tackles viruses in addition to bacteria and cysts (protozoa). There are two methods commonly used to purify water in portable purification products. One uses ‘hollow fibre membranes’ which basically act as a physical barrier, catching microorganisms while letting water pass through. The second method involves using an element which chemically reacts with the contents of the water.

Hollow Fibre Membranes: These literally sieve the water (like straining peas), catching anything that is too big to get through the holes so it's the size of the holes (pores) in hollow fibre membranes that is crucial; the pores must be smaller than whatever we intend to block out. Most water filters use hollow fibre membranes with a pore size of 0.1 or 0.2 microns (100 or 200 nanometers). At this size, they will safely block out protozoa and bacteria, but viruses are much smaller, and pass through pores this size. Some waterborne viruses can be as small as 0.02 micron (or 20 nanometers).

The membranes we use in our LifeSaver purifiers have a pore size of approximately 15 nanometers or 0.015 microns. 

The real beauty of using hollow fibre membranes is that, as the product is used, the pores begin to block up. Eventually every single pore will be blocked and even water molecules won’t pass through. Whilst this seems like a downside for the user (as they’ll need a replacement cartridge), it’s incredibly important to have a visible sign that your product isn’t working anymore. You can’t drink dangerous water from a LifeSaver product if it stops letting water come through! It’s because of this feature, coupled with the fact we block viruses and are fully tested to NSF P231 standards, that we call our products FAILSAFE.

Adsorptive Technology: Some water purifiers rely on using elements to have chemical reactions with contaminants in the water. This element effectively creates an attraction, a bit like when someone’s hair is attracted to a balloon because of static. As the water passes through, the contaminants in the water are drawn to the element and stick to it, meaning only safe water passes through to the user. That’s great in the short term, but unfortunately it doesn’t take long for the element to lose its level of attraction. As the element gets more and more contaminants stuck to it, it becomes less and less effective, especially with cloudy water. Products using this technology would struggle with Type 3 water. The short term effectiveness of these products is exactly why some companies only test the first 1 litre!

However, the real danger with products using adsorptive technology is that once the element stops attracting the harmful contaminants, there’s no physical barrier to block them from passing through the user. To make matters worse, there’s no way for the user to know when the element has reached that point! This is why some water purifiers will claim to remove viruses for just 100 litres (not very much at all) or even suggest replacing the element every few months. This leaves the customer having to either keep count of the number of litres they’re drinking, or remember how long ago they replaced the element. Not very practical and not very safe!

So products using adsorptive reactions aren’t effective for very long. The user can’t tell when they’ve stopped purifying water effectively, so therefore you’re gambling with your health. LifeSaver water purifiers use hollow fibre membranes which eventually block up, protecting the user.

So what has all that got to do with pigs?

Think of purifiers in terms of The Three Little Pigs. All three built credible homes that gave them shelter from rain and sun. Great. But when the Big, Bad Wolf came huffing and puffing, the only pig that was actually safe from harm was the one that invested in building a house using bricks and mortar.

Most of our competitors choose the filter equivalents of straw and sticks, providing only basic protection. LifeSaver products were originally designed to be used by vulnerable people in developing countries or following disasters; we knew our solutions had to be wolf-proof - removing ALL potentially harmful microorganisms and preventing continued use when the filter ceases to do its job.

It’s because of this that we pride ourselves on offering the safest water purifiers you will find. And that is why LifeSaver Water Purifiers generally cost a bit more than the alternatives you'll see advertised. They are, quite simply, the most effective.

So, with that in mind, we'll leave you with one last question.

Which little pig would you want to be?