10 Reasons to Apply for NSF REG4 Certification for UK Water Fittings
March 4, 2021
NSF REG4 certification is an alternative way for plumbing product manufacturers and materials suppliers to conform with UK regulations in a seamless, easy-to-manage process.
The NSF REG4 certification scheme for the UK market allows plumbing products and materials to show compliance with the Water Supply (Water Fittings) Regulations 1999. This certification was developed by NSF as a way for plumbing product manufacturers and materials suppliers to conform with UK regulations in a seamless, easy-to-manage process.
Going through the certification process also helps you advance your entire supply chain and business to a higher level.
So, what makes this certification scheme unique and better than other options on the market? Here are the 10 main reasons to consider NSF REG4:
- 1
Dedicated account manager who keeps you in the loop
You will be assigned a dedicated account manager the day you start the process with NSF. They will be your single point of contact for all your needs, providing ongoing status updates and letting you know next steps, so you can focus on your other strategic priorities. You never have wonder about project status and can spend less time on administration in this one-stop-shop experience. - 2
Transparency and full control
NSF is the sole certification body for NSF REG4 and has an ISO/IEC 17025 accredited laboratory in Wales, which specializes in testing water fittings. Not being dependent on any other organization for approval or certification, NSF can provide you with full transparency, so you have full visibility into the certification process. - 3
Faster turnaround times, faster to market
Every day you wait for an approval or certification is lost revenue. Your NSF account manager is fully aware of your business needs and will meet the deadlines to get your product on the UK market. - 4
No restricted application dates
Unlike other certification or approval paths, NSF REG4 has no application timeframes or cut-off dates. You can submit your application anytime during the year, month or week. This allows working on your own schedule and not losing any days of revenue while waiting. - 5
Instant listing
Once you are certified, it takes mere hours for your product to appear in NSF’s online listings. Within 24 hours, you can prove that your product is certified and start promoting and selling it. - 6
Consistency - No unpredictable scheme changes
NSF REG4 certification was developed based on 30 years of expertise in the UK market and to provide the market with a better and more robust solution. NSF REG4 certification is a UKAS accredited scheme and it will only be updated based on sector needs. In fact, we are organizing an annual industry forum to gather your feedback and ideas to keep it up to date. You will not be challenged by unpredictable changes in the certification and will have a smooth/stable process. - 7
Full supply chain traceability and guaranteed material and end-product quality
NSF REG4 certification can also provide traceability of your entire supply chain. By requesting your suppliers to be NSF REG4 certified, you ensure that a third-party will be auditing your suppliers and monitoring the quality of the materials you’re using. You can proudly demonstrate your certification when you need to show that your products meet regulatory or quality requirements. - 8
Continuous certification without interruption
There will be no expiry date or interruptions in your certification. Your account manager will contact you to complete the necessary documentation, testing and/or auditing every year, so your certification will continue seamlessly. - 9
Advantages applying for other NSF or regional certifications
As your single point of contact, your account manager knows your company and certification requirements, and can help you bundle audits with any other NSF or regional certifications. - 10
The only UKAS accredited certification scheme for water fittings
We are ISO 17065 accredited by UKAS to certify to the NSF REG4 scheme. ISO 17065 contains requirements for the competence, consistent operation and impartiality of certification bodies like us.
Interested in Learning More?
Join our mailing list to receive case studies, webinars and news.
How NSF Can Help You
Get in touch to find out how we can help you and your business thrive.
What’s New with NSF
NSF Issues First-Ever MSC Certification for an Eel Fishery to Perupez S.A.C. and Sakana del Peru
June 19, 2026Third-party certification plays a key role in independently verifying the sustainability of seafood operations.
iNADO Partners with NSF to Support Members and Athletes
May 27, 2026iNADO is pleased to welcome NSF’s expertise and experience in support of its members and the athletes they serve
NSF Ends UK’s Three-Year Testing Gap with REG 31 Testing Designation
May 20, 2026NSF’s Oakdale laboratory becomes the UK’s sole facility offering comprehensive BS 6920 and REG 31 testing, closing a critical drinking water safety gap.
Tangent® Materials Announces Industry First: Tangent PolySheet™ CB Earns Certification to NSF 537, Becoming the First PFAS-Free NSF Standard 51 Food Equipment Material
May 20, 2026New food-grade synthetic cutting-board sheet, engineered from the ground up without per- and polyfluoroalkyl substances (PFAS), establishes a new materialsafety benchmark for food-contact and food-equipment applications.