Hitze Insights
Piping & Heating Technical Guides
Specification, certification and sourcing guides for wholesalers, contractors and private-label brands — written from the Hitze engineering desk.
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Latest technical guides
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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Declaration of Performance (DoP) & CE Marking for Pipe: A Buyer’s Guide
Why your PEX & PP-R water pipe has no CE mark or DoP under the CPR, what proves compliance instead, and the…
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Certification-Pack Checklist: Documents to Demand From Your Pipe Supplier
The exact certification pack to demand from a pipe supplier before you pay: certificates, test reports, mill certs and how to verify…
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PE-RT vs PEX for Underfloor Heating: A Radiant Installer’s Comparison
PE-RT vs PEX for underfloor heating: a radiant installer guide to flexibility, fittings, temperature ratings and the DIN 4726 oxygen barrier.
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PP-R vs PPR-CU (Antibacterial) vs Multilayer for Hot & Cold Water
PP-R vs PPR-CU antibacterial vs multilayer for hot & cold water: a wholesaler's guide to standards, joints, expansion and which pipe to…
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Uponor / Rehau Alternative: Comparable PEX-A Systems for Trade Buyers
A trade buyer's guide to comparable PEX-a systems: which standard makes an alternative drop-in, where the 20-40% margin lives, and who should…
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Press-Fitting Jaw Profiles (TH / U / F / M): Tool Compatibility Explained
TH, U, F and M press-fitting jaw profiles explained: which pipe each fits, why they aren't interchangeable, and how to switch brands…
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Mixing Pipe & Fitting Brands: The Warranty & Leak Risk
Mixing PEX fitting brands can void warranties and raise leak risk. See which joints are safe to mix, which aren't, and why…
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Building a Warrantable Pipe + Fitting System: The Single-Brand Case
A warrantable pipe system needs one brand for pipe and fittings. Why mixing brands voids coverage, what standards require, and how Hitze…
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