NSF Water Filters & Certifications
With a host of NSF certified ceramic water filters and water filter systems, Doulton is dedicated to bringing water safety innovation and education to families worldwide. Meticulously tested and independently certified by NSF, Doulton and British Berkefeld water filtration systems are trusted to bring cleaner, safer and tastier water straight to your home.
What is NSF?
Founded in 1944 as the National Sanitation Foundation, NSF has grown into a global organization operating in more than 180 countries.
NSF is a global, independent public health and safety organisation dedicated to improving human health worldwide by developing and setting public health standards.
NSF have developed a range of specific standards for point of entry (POE) and point of use (POU) water systems collectively known as drinking water treatment units (DWTU). Their service team test, audit & certify products independently to these standards before bestowing the coveted NSF Listing and certification mark.
Products that are NSF listed and bear the certification mark on their products, packaging and marketing demonstrate that they meet all the relevant standard requirements. Frequent product testing & regular inspections are carried out by NSF to verify that the products continue to perform & comply with the standards.
NSF for Water Filters
When a product is described as “NSF certified,” it means it has been independently tested and verified to meet health, safety, and other performance requirements. This certification demonstrates that products are safe for their intended use and comply with established industry standards.
Material safety under NSF/ANSI Standard 42 is a minimum requirement for NSF certification of water filters to ensure that the filter itself does not leach any harmful substances into your drinking water and the system will not leak. Further requirements such as metals or chemical reduction are addressed under additional standards.
Verify Authenticity:
By choosing a water filter that has been tested by NSF, you can also be assured that there is truth in the claims that the company is making by checking their NSF listings against the appropriate standards.
Note: Product names shown reflect Doulton and British Berkefeld consumer-facing naming conventions. Product names listed in NSF records may differ. Regardless of any naming differences, the applicable NSF testing standard remains the same.
Products certified to the following NSF/ANSI standards.
NSF 42 Taste, odour and structural integrity Zobacz produkty Ukryj produkty
Material safety and structural integrity. Improves water quality by reducing aesthetic impurities.
Doulton
Systems
- Kingfisher under sink system with Biotect Ultra
Replacement elements
- Biotect Ultra (2501)
- Ultracarb (9501)
British Berkefeld
Systems
- 8.5l gravity system with Ultra Sterasyl filters
- 8.5l gravity system with Ultra Fluoride filters
Replacement elements
- Ultra Sterasyl (8674)
- Ultra Fluoride (8B76)
NSF 53 Health related contaminant reduction Zobacz produkty Ukryj produkty
Focuses on contaminants that can affect health
Doulton
Systems
- Kingfisher under sink system with Biotect Ultra
Replacement elements
- Biotect Ultra (2501)
- Ultracarb (9501)
British Berkefeld
Systems
- 8.5l gravity system with Ultra Sterasyl filters
- 8.5l gravity system with Ultra Fluoride filters
Replacement elements
- Ultra Sterasyl (8674)
- Ultra Fluoride (8B76)
NSF/CAN 372 Drinking water systems and components, low lead compliance Zobacz produkty Ukryj produkty
Does not relate to filtration capability just compliance with the low lead requirement the US SDWA
Doulton
Systems
- Kingfisher under sink system with Biotect Ultra
- HIP DUO Under Sink Water Filter System with Biotech Ultra
- HIP TRIO Under Sink Water Filter System with Biotech Ultra
- HIS Push-fit Under Sink Water Filter System with Biotech Ultra
Replacement elements
- Biotect Ultra (2501)
- Ultracarb (9501)
British Berkefeld
Systems
- 8.5l gravity system with Ultra Sterasyl filters
- 8.5l gravity system with Ultra Fluoride filters
Replacement elements
- Ultra Sterasyl (8674)
- Ultra Fluoride (8B76)
NSF 401 Emerging contaminants Zobacz produkty Ukryj produkty
Covers new or unregulated contaminants
Doulton
Systems
- Kingfisher under sink system with Biotect Ultra
Replacement elements
- Biotect Ultra (2501)
- Ultracarb (9501)
British Berkefeld
Systems
- 8.5l gravity system with Ultra Sterasyl filters
- 8.5l gravity system with Ultra Fluoride filters
Replacement elements
- Ultra Sterasyl (8674)
- Ultra Fluoride (8B76)
A Look at NSF Testing
Consistency of performance over a 5-year repeat cycle
NSF testing is generally a choice, not an obligation. The main obstacle for companies is financial; NSF testing is incredibly expensive and to maintain certification all testing is repeated every 5 years to ensure consistency of performance. Additionally, manufacturers of NSF certified products receive unannounced annual factory inspections and audits.
Another factor to consider is that the standards are high and the tests are difficult to pass. To protect consumers, the performance claims made for products on advertising, literature and packaging are audited and signed off by NSF during the certification process. So, you can be sure that a company with official NSF listings for a range of standards has taken the decision to put quality, safety, performance and honesty at the core of their product range, so their performance claims can be trusted. When evaluating the best water filter for you, consider what you are looking for. When it comes to the level of protection you need; is it purely taste and odour, or are you worried about a wider range of contaminants that may be present in your drinking water? If you chose an NSF certified product you can be sure of the product quality.
Choosing & Checking Your Filter
The best NSF certified water filters are those that directly address your concerns and are backed up by official listings on the NSF.org website. The different standards address different types of contaminants and concerns with your water. If you are looking for a system to simply improve taste and odour, then a product that has NSF/ANSI 42 will be perfect. However, if you have concerns around lead, look for an NSF/ANSI 53 standard as this covers health-related contaminants.
As NSF is one of the most respected accolades for water filters to hold, you may find some brands exaggerate truths. Always cross-reference. Start by looking at the printed or online advertising, product packaging or the product itself for the official NSF mark.
Tip: Watch for Footnotes
Look out for lettered footnotes (such as [G]) next to a product name in listings. These provide additional certification details that may not be obvious from the listing itself.
Verify Certified Products
Input the manufacturer, brand or product name directly into the official database to confirm the scope of certification.
Buying NSF Certified Water Filters
It is usually best to go to the brand’s official website, official distributors or marketplaces to ensure that you are getting original, NSF tested products. This ensures that you are not only able to evaluate the testing accurately with the water filter and your requirements, but you are also ensuring that any products you do purchase are genuine.
Even water filters can be open to counterfeits, so always shop safely and if in doubt you can check product authenticity on websites. For example, here at Doulton you can verify your filters directly.
