UK Certifications and Approvals

Apply for NSF REG4 certification, NSF TMV certification, WRAS approval or BS 6920 testing to comply with UK regulations.

NSF tests and certifies plumbing products to meet the regulatory requirements required to sell water products in the United Kingdom. We also submit test reports required for industry certifications.

Our Services

Use of NSF consulting services or attending NSF training sessions does not provide an advantage, nor is it linked in any way to the granting of certification.

NSF REG4 Certification
Demonstrate plumbing product and material compliance with the UK’s Water Supply (Water Fittings) regulations and byelaws through a fast, efficient, robust process.
Testing for BS 6920
Test your products for a quicker path to BS 6920 compliance.
WRAS Approval Services
If you need WRAS Approval for your water fitting products sold in the UK market, NSF offers full product testing and we submit your reports to WRAS.
TMV Certification
Apply for verification testing and certification services for the TMV2 and TMV3 UK-based certification requirements.
DWI UK Regulation 31 Approval Testing
NSF is a DWI-designated and UKAS-accredited laboratory providing complete UK Regulation 31 (Reg 31) testing services. We support BS 6920 and leachate studies under one roof, helping streamline your route to approval.

Resources

Navigating the New EU Regulations: Materials and Products in Contact with Drinking Water
Article
This paper discusses challenges and solutions related to the harmonization of materials testing and evaluation, particularly for plastic granulates and pipes.
NSF/ANSI/CAN 61 Readiness Tool
Article
Interested in getting your product certified to NSF/ANSI/CAN 61? Our readiness tool gives you insight into how prepared you are to begin the process.

What’s New with NSF

NSF Ends UK’s Three-Year Testing Gap with REG 31 Testing Designation
May 20, 2026
NSF’s Oakdale laboratory becomes the UK’s sole facility offering comprehensive BS 6920 and REG 31 testing, closing a critical drinking water safety gap.
Read the Story

UK Certifications and Approvals

Our Services

NSF REG4 Certification

Testing for BS 6920

WRAS Approval Services

TMV Certification

DWI UK Regulation 31 Approval Testing

Resources

Navigating the New EU Regulations: Materials and Products in Contact with Drinking Water

NSF/ANSI/CAN 61 Readiness Tool

What’s New with NSF

NSF Ends UK’s Three-Year Testing Gap with REG 31 Testing Designation