The NSF REG4 certification scheme for the UK market allows plumbing products and materials that are in contact with drinking water to demonstrate compliance with the UK’s Water Supply (Water Fittings) regulations and byelaws.

Going through the certification process also helps you advance your entire supply chain and business to a higher level.

This scheme covers water fittings, pipes, and appliances that come into contact with drinking water. Products include valves, backflow-prevention devices, taps, mixers, shower heads, pipes and fittings, tanks, cisterns, water meters, washing machines, dishwashers, steam ovens, and many others. NSF REG4 approval also extends to non-metallic products, like rubbers, coatings, cement, resins, and sealants.

Depending on the number of products you sell in the UK, NSF offers two solutions tailored to meet your needs:

• NSF REG4 1+, which includes an annual facility audit requirement that enables a reduced level of retesting after five years
• NSF REG4 S3, which does not have a facility audit requirement but mandates a full retest after five years