Trust & Compliance

Pipe Certifications — Verifiable Market Access for North America & Europe

For a piping brand, a certification is not a logo — it is the difference between a container that clears customs and one that gets rejected at the dock. Hitze’s baseline is German-standard proof you can hold in your hand: our PP-R lines are SKZ-tested and built to DIN 8077/8078 and EN ISO 15874 — printed right on the pipe.

On top of that we organize compliance around two markets at once — North America (cUPC / UPC, NSF-14, NSF/ANSI 61, CSA, ASTM) and Europe / UK (DVGW, WRAS, CE + DoP, DIN 4726, EN ISO) — and we make every claim verifiable: read the mark, check the number, at the source.

Download the Cert & DoP Pack → Verify a Listing →

Written for importers, distributors, private-label brands and contractors who carry the compliance risk — your due-diligence starting point.

Hitze CNC machining hall where certified brass fittings are produced under German standards

SKZ · DVGW · cUPC · NSF-61 · WRAS · CE

The Evidence

A Certification Wall You Can Actually Verify

A wall of marks means nothing if you can’t confirm it. This is what backs every claim on this page — the machining hall behind our certified brass, the marks printed on the pipe, and the documents you can request and check at source.

Hitze CNC brass lathe hall producing certified low-lead potable fittings — Certified brass — machined in our own CNC hall

Hitze pressure pipe with printed certification mark and listing number along the surface — cUPC / UPC (IAPMO) listing mark — printed on the pipe

Installed potable-water plumbing in a bathroom fed by Hitze pipe and fittings — Potable-water plumbing — NSF-14 / NSF-61 rated line in service

Bathroom fit-out plumbed with Hitze potable-water pipe approved for DVGW and WRAS markets — DVGW & WRAS-approved potable line — installed detail

Multilayer PEX-AL-PEX composite pipe with printed standard markings and CE reference — Multilayer PEX-AL-PEX pipe — CE-marked, backed by Declaration of Performance

Hitze PP-R pressure pipe and fittings, the SKZ-tested lines built to DIN 8077/8078 — SKZ-tested PP-R pipe & fittings — DIN 8077/8078 lines

SKZ Tested DIN 8077/78 EN ISO 15874 cUPC / UPC (IAPMO) NSF-14 / NSF-61 DVGW WRAS CE + DoP DIN 4726 Oxygen Barrier

1974

Founded · 50+ Years

Markets Covered (NA + EU/UK)

Official Registers to Verify (IAPMO · DVGW · WRAS)

118+

Export Countries

Proof First

The German-Standard Baseline: SKZ-Tested, DIN 8077/8078 & EN ISO 15874

Before any regional listing, Hitze pipe starts from a German engineering baseline you can verify on the product itself. Our PP-R lines carry three marks that are printed on the pipe and backed by documentation we can show.

Mark on the pipe	Body / origin	What it proves
SKZ certificate	Süddeutsches Kunststoff-Zentrum — a German plastics testing & certification institute	Independent German testing of the polymer piping — the strongest fit for a German-standard brand
DIN 8077 / DIN 8078	Deutsches Institut für Normung (German standards body)	Dimensions (8077) and general quality / testing requirements (8078) for polypropylene pipe
EN ISO 15874	CEN / ISO	The European standard for PP-R (polypropylene) hot- & cold-water piping systems

Green PP-R pipe printed with OD, pressure class and standard markings along the pipe — PP-R pipe print — DIN 8077/8078 · EN ISO 15874 · SKZ & pressure class

German brand, proven at the source: Hitze is a German brand — the trademark is registered with the Deutsches Patent- und Markenamt (German Patent and Trademark Office, Munich) under No. 30 2020 005 484, a hard third-party record you can look up yourself. The brand is backed by 50+ years of manufacturing heritage (founded 1974) and production to German DIN standards — engineered in Germany, built to DIN.

Tested performance you can quote: Every Hitze PP-R type is pressure-classed from testing, not marketing. The self-cleaning ceramic-core (green, red-stripe) and fiber-glass-reinforced lines are rated class 1 = 10 bar / class 2 = 8 bar; the aluminium-composite line is rated class 1 = 6 bar / class 2 = 4 bar — all across OD 20–110 mm (DN15–DN90), to DIN 8077/8078 + EN ISO 15874 + SKZ.

PP-R line	Construction	Pressure class 1	Pressure class 2	Standards
PP-R self-cleaning ceramic-core (green / red stripe)	Homogeneous PP-R + ceramic core	10 bar	8 bar	DIN 8077/8078 · EN ISO 15874 · SKZ
PPR-FB-PPR fiber-glass reinforced	3-layer, glass-fiber middle	10 bar	8 bar	DIN 8077/8078 · EN ISO 15874 · SKZ
PPR-AL-PPR aluminium composite	PP-R / aluminium / PP-R	6 bar	4 bar	DIN 8077/8078 · EN ISO 15874 · SKZ

Full dimension range — all three PP-R types, hot & cold water:

OD (mm)	Wall (mm)	Inner dia (mm)	Nominal (DN)
20	3.4	13.2	DN15
25	4.2	16.6	DN20
32	5.4	21.2	DN25
40	6.7	26.6	DN32
50	8.3	33.4	DN40
63	10.5	42.0	DN50
75	12.5	50.0	DN63
90	15.0	60.0	DN75
110	18.3	73.4	DN90

PP-R pipe ends stacked showing the size range across green, orange and white types — PP-R size lineup OD 20 → 110 mm — cut cross-sections

See the SKZ / DIN / EN ISO References →

North America

North America: cUPC / UPC, NSF-14, NSF/ANSI 61, CSA & ASTM

In North America, a plumbing product is only usable if the local inspector (AHJ) will accept it. That acceptance runs through a chain of certifications — each one testing a different thing.

Bathroom plumbing accessories fed by cUPC/UPC-listed Hitze pipe and fittings — cUPC / UPC (IAPMO) listed line — finished install

Lead-free brass compression fitting joined to a potable water pipe on a heating riser — NSF & CSA marks — potable line detail

PE-RT and PEX heating pipes in blue, orange, white and grey with printed size and standard markings — Pipe print — ASTM F876 / F877 markings

Certification	Body	What it tests	Why it = market access
cUPC / UPC	IAPMO (listing)	Product complies with the Uniform Plumbing Code; carries a printed listing mark	AHJs accept the product for installation; without it, it fails inspection
NSF-14	NSF	Plastic piping material, performance & marking	Baseline material certification for PEX systems
NSF/ANSI 61	NSF	No harmful contaminant leaching into drinking water	Effectively mandatory for potable-water lines
CSA	CSA Group	Product/standards conformity (often paired for Canada)	Canadian market acceptance
ASTM F876 / F877	ASTM	PEX tubing dimensions & performance / hot-water systems	The material standard PEX is built and tested to
ASTM F1281 / F1282	ASTM	PEX-AL-PEX multilayer (metal-plastic) pipe	Standard for the 5-layer composite line

Hitze status: Hitze holds cUPC/UPC (IAPMO) listing, NSF-14 and NSF/ANSI 61 certification, and our PEX and PEX-AL-PEX lines are certified to ASTM F876/F877 and F1281/F1282. The specific listing numbers and exact per-model coverage are published in the Certification Pack and verifiable in IAPMO’s and NSF’s official registers — available on request.

Get the NA Compliance Matrix →

Europe & UK

Europe & UK: DVGW, WRAS, CE + Declaration of Performance, DIN 4726 & EN ISO

Europe and the UK run on a different compliance logic — national approvals (DVGW, WRAS) plus CE marking backed by a Declaration of Performance (DoP), and product performance defined by EN ISO and DIN standards.

Certification / Standard	Region	What it covers	Why it matters
SKZ	Germany	Independent testing/certification by the Süddeutsches Kunststoff-Zentrum (German plastics institute)	German third-party proof of the polymer piping — printed on our PP-R lines
DIN 8077 / 8078	Germany	PP pipe dimensions (8077) & quality/testing (8078)	The German dimensional & test benchmark our PP-R is built to
EN ISO 15874	EU	PP-R (polypropylene) hot- & cold-water piping systems	The European PP-R system standard
DVGW	Germany / DACH	German water & gas certification	The benchmark approval for German-standard potable & heating systems
WRAS	UK	Water Regulations Advisory Scheme — potable safety	Required for products contacting drinking water in the UK
CE + DoP	EU	Conformity marking + manufacturer’s Declaration of Performance	Legal basis for placing construction products on the EU market
DIN 4726	Germany / EU	Oxygen-diffusion (EVOH) barrier for underfloor heating	Prevents oxygen ingress that corrodes boilers & manifolds
EN ISO 21003	EU	Multilayer (metal/plastic composite) piping systems	Standard for PEX-AL-PEX / PERT-AL-PERT
EN ISO 15875	EU	Crosslinked polyethylene (PEX) piping systems	Standard for PEX heating & potable systems

Why the German lens matters: As a German brand, Hitze treats DVGW + DIN 4726 as the engineering baseline. The oxygen barrier (EVOH layer) required under DIN 4726 blocks the oxygen diffusion that corrodes boilers and steel manifolds in closed hydronic loops — a detail cheap pipe skips. See our pipe technology for how the multilayer structure is built.

Hitze status: Hitze’s PP-R lines are SKZ-tested and built to DIN 8077/8078 and EN ISO 15874 — the marks are printed on the pipe, so this proof is available today. Hitze also holds DVGW and WRAS approval and CE marking backed by a Declaration of Performance, and our multilayer and PEX lines are certified to EN ISO 21003, EN ISO 15875 and DIN 4726. The SKZ certificate is available on request; the specific DVGW/WRAS certificate and DoP numbers, plus exact per-model coverage, are published in the Certification Pack and verifiable in the DVGW and WRAS official registers — available on request.

Hitze low-lead brass potable-water fittings from the DVGW- and WRAS-approved range — DVGW & WRAS-approved brass fittings — potable-water range

Download the DoP & DVGW/WRAS References →

Verifiability

How to Verify a Certification — Don’t Trust It, Check It

Any supplier can print a logo. A real listing lives in the certifying body’s public register. Here’s how to confirm one in under two minutes.

Read the mark on the product

Genuine pipe and fittings carry a printed certification mark and a listing/certificate number.

Go to the certifying body’s official database

Not a supplier PDF — the real register:

cUPC / UPC → IAPMO official listing database (search by company or file number)
DVGW → DVGW online certificate register
WRAS → WRAS approved products directory

Search the exact number

A valid product appears under that number, tied to the certificate holder and product scope.

Check the scope

Confirm the listing covers the specific product and size you’re buying — not just “the brand.”

Fitting connected to pipe showing the printed size and standard markings used to look up a listing — Verify at source — pipe listing mark beside the official IAPMO / DVGW / WRAS register search

Hitze listing numbers: Hitze’s PP-R lines are SKZ-tested and built to DIN 8077/8078 and EN ISO 15874 (marks printed on the pipe), and the German brand is registered with the DPMA in Munich under No. 30 2020 005 484 — both verifiable today. Hitze also holds cUPC/UPC, NSF-14, NSF/ANSI 61, DVGW, WRAS and CE + DoP; the individual listing and certificate numbers — and a direct link to each entry in the official register — are published in the Certification Pack and available on request, so you can verify every one at source.

Verify a Listing → Request Our Listing Numbers →

Potable Safety

Lead-Free Compliance for Potable Water

For drinking-water systems, the metal matters as much as the pipe. Hitze specifies low-lead / lead-free brass for potable fittings and manifolds.

DZR (Dezincification-Resistant) brass — grades such as CW724R and CW511L — resists the corrosion that leaches zinc and fails in aggressive water.
Aligned with the North American weighted-average lead limit for wetted surfaces and intended to pair with NSF/ANSI 61 for drinking-water contact.
Applies to press fittings (brass body + stainless sleeve + plastic ring), push-fit / compression fittings, and manifolds.

Hitze status: Hitze potable fittings and manifolds use low-lead / lead-free DZR brass (grades such as CW724R and CW511L) and are certified to NSF/ANSI 61 for drinking-water contact, meeting the North American weighted-average lead limit. The specific NSF/ANSI 61 listing numbers and grade-per-model coverage are published in the Certification Pack and available on request.

Low-lead DZR brass stop valve and union fittings for potable water, certified to NSF/ANSI 61 — Low-lead DZR brass — potable fittings & unions

Lead-Free Brass Fittings UFH Manifolds

Get the Lead-Free & NSF-61 References →

Cert & DoP Pack

Download the Certification & DoP Pack

One email, one PDF — everything your compliance, customs and AHJ conversations need. The Certification & DoP Pack includes:

The Hitze multi-market compliance matrix (which product line → which certifications, by market)
Declarations of Performance (DoP) and Technical Data Sheets (TDS) for our certified lines
Verifiable listing references with official-database links, so you can confirm each certificate at source
Standards cross-reference (ASTM ↔ EN ISO ↔ DIN)

Hitze product poster showing model, size range and certification marks — Cert & DoP Pack — document stack cover mockup with Hitze mark

Certification & DoP Pack

Compliance matrix, DoPs, TDS and verifiable listing references in one PDF. Work email required — tell us your market (NA / EU / UK) and role so we send the right documents.

Download the Pack →

Need something specific? Talk to our compliance team or request a quote. Reselling into a regulated market? See wholesale supply and private-label & ODM for who issues the DoP under your brand. Speccing these DoPs and TDS into a build? See project & spec piping supply.

FAQ

Certification & Compliance FAQ

What proves Hitze is really a German brand and German-standard?

For EveryoneTwo hard, third-party records. The Hitze trademark is registered with the German Patent and Trademark Office (DPMA, Munich) under No. 30 2020 005 484, and our PP-R lines are SKZ-tested (a German plastics institute) and built to DIN 8077/8078 and EN ISO 15874 — printed on the pipe. Hitze was founded in 1974.

Is Hitze cUPC listed for North America?

For the Importer / Compliance BuyerYes. Hitze pipe and fittings hold cUPC/UPC listing — the IAPMO listing that lets PEX and fittings be accepted by AHJs under the Uniform Plumbing Code. Every listed item carries a printed mark and number you can verify directly in IAPMO’s official database — no PDF required. Listing numbers are available on request.

Is the potable line NSF/ANSI 61 certified?

For the Contractor / InstallerYes. NSF/ANSI 61 certifies a product won’t leach contaminants into drinking water above health limits — effectively mandatory for potable lines in North America. It pairs with NSF-14 (material/marking) and low-lead brass. Hitze holds these certifications; listing numbers are available on request and verifiable in NSF’s register.

Does Hitze have DVGW and WRAS for Europe and the UK?

For the DistributorYes. DVGW is Germany’s water/gas certification; WRAS is the UK potable-water approval — each the recognized market-access mark for its region, searchable in its official register. Hitze holds DVGW and WRAS approval; certificate numbers are available on request and verifiable in each body’s official online register.

How do I verify a certificate is real?

For EveryoneRead the mark and number printed on the product, then search the certifying body’s official database directly: IAPMO for cUPC/UPC, DVGW for German approvals, WRAS for UK potable approvals. A genuine listing appears under the exact number, tied to the holder and product scope — verify at source.

Are the brass fittings lead-free?

For the Private-Label BrandYes. Hitze specifies low-lead brass for potable fittings and manifolds — dezincification-resistant DZR grades such as CW724R / CW511L — meeting the North American weighted-average lead limit and matching NSF/ANSI 61 for drinking-water contact. NSF/ANSI 61 listing numbers are available on request.

Get Started

Request a Quote & the Cert Pack

Tell us your market (NA / EU / UK), product lines and volumes — we reply within one business day with pricing, the certification documents and DoPs for your region, and listing numbers you can verify at source. There’s no MOQ: start with samples or a small trial order, and every matched Hitze pipe-and-fitting system is backed by a 50-year warranty.

Request a Quote → Cert Pack →