Author

Justin

Justin

Senior Piping Industry Expert

Justin leads technical content at Hitze, where he translates 50 years of German-engineered piping know-how into guidance trade buyers can actually use. He works across the full system — multilayer PEX-AL-PEX, PEX-a/b/c, PE-RT underfloor pipe, PP-R and PPR-CU, plus press, compression, push-fit and lead-free brass fittings and manifolds — from resin grades, crosslinking and heat-fusion methods through to hydrostatic and oxygen-barrier performance. His focus is the part that trips up importers and private-label brands most: the certification maze (cUPC, NSF/ANSI 61, DVGW, WRAS, SKZ, CE with Declaration of Performance) that decides which product clears which market, and how to verify a factory before a container order. He writes for wholesalers, importers, contractors and private-label brands sourcing plumbing and heating pipe for North America and Europe.

By this author

Guides & Articles

Balancing an Underfloor Heating Manifold: Flow-Meter Settings
Fittings & Systems

Balancing an Underfloor Heating Manifold: Flow-Meter Settings

Cold rooms with the pump running? The full manifold balancing procedure: calculate per-loop flow, purge, set the 0-2.5 L/min meters, avoid actuator…

July 21, 2026 · 18 min read
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Fitting Pressure Ratings (PN16/PN25): Why the Joint Sets the Limit
Fittings & Systems

Fitting Pressure Ratings (PN16/PN25): Why the Joint Sets the Limit

PN16 vs PN25 fitting pressure ratings: temperature derating, EPDM seal limits, EN 1254, and why the system rating is the weakest joint.…

July 21, 2026 · 16 min read
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Galvanic Corrosion in Plumbing: Mixed-Metal Connections Explained
Fittings & Systems

Galvanic Corrosion in Plumbing: Mixed-Metal Connections Explained

Galvanic corrosion in plumbing explained for contractors: the galvanic series, copper-to-galvanized failure, dielectric unions vs brass transitions, and DZR grades.

July 21, 2026 · 19 min read
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PPSU vs Brass Push-Fit Fittings: Material Trade-Offs
Fittings & Systems

PPSU vs Brass Push-Fit Fittings: Material Trade-Offs

PPSU vs brass push-fit fittings compared for wholesalers: hydrolysis, DZR grades, UV, stress-cracking, price index and certs. A stocking matrix from Hitze.

July 21, 2026 · 15 min read
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Cold Expansion (F1960) vs Crimp (F1807): PEX Connections Compared
Fittings & Systems

Cold Expansion (F1960) vs Crimp (F1807): PEX Connections Compared

F1960 cold expansion vs F1807 crimp for contractors: verified ASTM scopes, flow-path ID math, tool costs, cold-weather behavior and warranty risk.

July 21, 2026 · 16 min read
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Inside PEX-AL-PEX: Why Butt-Welded Aluminium Layers Matter
Pipe Selection

Inside PEX-AL-PEX: Why Butt-Welded Aluminium Layers Matter

Not all multilayer is equal: how a butt-welded aluminium core in PEX AL PEX pipe beats overlap welds on concentricity, oxygen barrier…

July 21, 2026 · 17 min read
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PEX Chlorine Resistance: What F876 CL Ratings Mean
Pipe Selection

PEX Chlorine Resistance: What F876 CL Ratings Mean

What PEX chlorine resistance really means: ASTM F876 CL1/CL3/CL5 classes, F2023 testing, PPI TR-4 and NSF-pw explained for spec engineers.

July 21, 2026 · 16 min read
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Thermal Expansion in Plastic Pipe: PEX vs Multilayer vs PP-R
Pipe Selection

Thermal Expansion in Plastic Pipe: PEX vs Multilayer vs PP-R

Grounded coefficients for pipe thermal expansion: PEX ~0.15-0.20, multilayer ~0.025, PP-R ~0.15 mm/(m·K). Worked 30 m riser at ΔT 40 K, loops…

July 21, 2026 · 18 min read
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PPR Pipe Sizes, SDR & PN Ratings: 20mm to 110mm Spec Guide
Pipe Selection

PPR Pipe Sizes, SDR & PN Ratings: 20mm to 110mm Spec Guide

PPR pipe size chart 20–110mm: SDR 11/7.4/6 walls per DIN 8077, PN ratings at 20°C vs hot derating, and how to match…

July 21, 2026 · 14 min read
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PEX vs Copper for Potable Water: A Trade Buyer’s Comparison
Pipe Selection

PEX vs Copper for Potable Water: A Trade Buyer’s Comparison

PEX vs copper for potable water: installed cost, chlorine and freeze behavior, theft risk, code acceptance, recirc limits — a trade buyer's…

July 21, 2026 · 18 min read
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