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Certifications & Compliance
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Technical articles and updates
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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cUPC vs NSF vs UPC: Which Certification Your US Plumbing Import Needs
cUPC, NSF and UPC certify different things. See which mark unlocks the US market for imported plumbing pipe and how to verify…
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WRAS, DVGW & KTW: Certifying Plumbing Pipe for the UK & EU
WRAS vs DVGW vs KTW for potable pipe: which mark unlocks the UK vs Germany, the EU positive-list transition, and how importers…
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DIN 4726 Oxygen Barrier: Why It Matters for Radiant-Heating Pipe
DIN 4726 explained: why oxygen-barrier pipe stops boiler corrosion in radiant heating, where you need it, and how Hitze builds PE-RT &…
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