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Certifications & Compliance
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Technical articles and updates
Regulation 31 Pipe Approval: Why Short Length Does Not Prove an Exemption
For public-water pipe in England and Wales, test the small-contact route, understand why short length proves little, and check current product evidence.
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NSF 61-G, 61-9, 61-4 and 61-8: What the Marks Mean
Decode legacy NSF 61-G and section numbers 4, 8 and 9, then separate a marking’s meaning from the current product listing and…
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Plastic Pipe Firestop Submittals: Match the Tested System
Match the tested firestop system to your plastic pipe, couplers and site conditions. Build a traceable US/Canada submittal before installation.
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EN ISO 15874 for PP-R Pipe: Service Classes Explained
A PN20 label tells you almost nothing about whether a PP-R pipe survives 50 years on your heating circuit. The service class…
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EN ISO 15874 for PP-R Pipe: Classes of Service Explained
EN ISO 15874 application classes for PP-R explained: class 1, 2, 4, 5 temperatures, 4-10 bar design pressures, S-series walls and the…
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EU Drinking Water Directive 2020/2184: New Material Rules for Pipe
EU drinking water directive 2020/2184 replaces national schemes with European Positive Lists. Exact acts, the 2026 and 2032 dates, and what buyers…
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BS 6920 Water-Quality Testing: What It Involves & Why It Matters
BS 6920 explained for UK importers: the six water-quality tests, pass thresholds, hot vs cold, how it underpins WRAS, and the report…
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SKZ Certification: What Germany’s Plastics Institute Tests on Pipe
SKZ certification explained for pipe importers: what the Würzburg lab tests, 5-year certificates, semi-annual factory audits, and how to verify a claim.
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ISO 9080 Explained: How a 50-Year Pipe Rating Is Actually Proven
ISO 9080 turns years of hydrostatic failure data into a proven 50-year pipe rating. How MRS, the 97.5% LPL and EN ISO…
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NSF/ANSI 61 & Lead-Free Brass: What Potable-Water Compliance Requires
NSF/ANSI 61 vs 372, the 0.25% lead-free rule, and DZR brass grades (CW724R, CW511L, CW617N) — what potable-water compliance actually requires, from…
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