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
PPR Pipe Failures: Diagnosing Fusion Joints That Leak
Six PP-R fusion defects: how each looks on a cut section and when it surfaces, plus the DVS 2207-11 table and the…
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PPR Pipe Advantages and Disadvantages: The Limits, With Numbers
A distributor calls because a hotel job has started weeping at the fittings on the top two floors. The pipe is PP-R,…
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PEX Pipe-in-Pipe Relining: Sizing, Clearance and When It Beats Repiping
Pex pipe in pipe relining pulls a smaller PEX tube through an existing host pipe and terminates it at both ends. The…
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Flexible Hot Water Pipe Options For Plumbing Systems
Table of Contents Why Flexible Hot Water Pipes Matter in Modern Plumbing PEX (Cross-Linked Polyethylene) Hot Water Pipes PPR (Polypropylene Random Copolymer)…
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Pipe for Underfloor Heating: Standards & Sourcing Guide
Pipe for underfloor heating is not one product. It is a loop pipe inside the floor, a distribution pipe between the plant…
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Fusion Pipe Welding: Methods, Equipment, and Joint Quality for PPR and HDPE Systems
Fusion welding is the only joining method that makes a thermoplastic pipe joint stronger than the pipe itself. No glue. No rubber…
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PPR Pipe Fittings Names: The Complete Reference with Sizes and Applications
Complete set of PPR pipe fittings arranged by type: couplers, elbows, tees, ball valve, brass-insert adapters and clips The first question a…
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How to Install PPR Pipe and Fittings: From Layout to Handover
Most crews that get called back to a PP-R job did not weld badly. They welded well, in the wrong place, on…
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Plastic Pipe Pressure Ratings Compared: PN, SDR and Why the Number on the Pipe Is Not the Whole Story
Plastic Pipe Pressure Ratings Compared: PN, SDR and Why the Number on the Pipe Is Not the Whole Story Every plastic pipe…
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PPR Fittings HS Code: Classify, Document, Clear a Container
PP-R pipe is HS 3917.22, fittings 3917.40. See the document matrix by market and which credentials a supplier can actually evidence by…
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