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
Exclusive Territory & Distribution Agreements With a Pipe Factory
Exclusive vs sole vs non-exclusive pipe distribution agreements: territory clauses, minimum-purchase terms, EU/US law and cert portability for buyers.
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Lead-Free Brass Grades (CW617N / DZR / CW724R): What They Mean for Potable Water
CW617N vs DZR (CW602N/CW511L) vs CW724R: which brass is lead-free, which resists dezincification, and which certificate unlocks each market for resale.
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How to Vet a PEX Pipe Manufacturer Before You Import
Sourcing PEX pipe from overseas is not hard to start — it’s hard to get right. Anyone can send you a glossy…
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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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German Pipe Brand vs China-Made: What ‘Engineered in Germany’ Actually Means
German brand vs Made in Germany: what each claim legally means for importers of German PEX pipe, and how to verify a…
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Factory Audit Checklist for Plumbing-Pipe Suppliers: 8 Red Flags
A pipe factory audit checklist for wholesalers: 8 red flags to verify a plumbing-pipe supplier before a container order, from USCC to…
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Single-Source vs Multi-Supplier Piping: Total Cost & Risk
Single-source vs multi-supplier piping, costed on total cost of ownership: PO load, volume leverage, warranty gaps and continuity risk for trade buyers.
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How to Verify a Pipe Certification Is Real (cUPC / NSF / DVGW / WRAS)
Certificate PDFs get faked. Learn to verify cUPC, NSF, DVGW & WRAS pipe certs in each body's free public directory using a…
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MOQ, Samples & First Orders: What a Real Pipe Factory Offers
How pipe manufacturer MOQ, samples and first orders really work for private-label buyers: what drives the floor, how to test cheaply, where…
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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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