Do your underfloor heating pipes have an oxygen barrier?

Yes. Our PE-RT and PEX-a underfloor heating pipe carry an EVOH oxygen-barrier layer per DIN 4726, which blocks oxygen diffusion through the pipe wall. That protects the boiler, manifold, pump and other ferrous components in a hydronic circuit from oxidation corrosion. Oxygen-barrier test data available on request.

PE-RT vs PEX-a for underfloor heating — which should I stock?

PE-RT is easy to coil, economical and needs no cross-linking proof, making it the volume choice for slab and radiant floor loops. PEX-a adds thermal-memory shape recovery and works with expansion fittings. Both are hydronic, both carry an EVOH oxygen barrier. Wholesalers usually stock PE-RT as the core line.

What coil lengths do your underfloor heating pipes come in?

We supply EVOH oxygen-barrier PE-RT and PEX UFH coils in 16, 20, 25 and 32 mm diameters, with coil lengths from 100 m to 300 m so a contractor can run a full loop without splicing mid-slab (for example 16x2.0 at 200 m, 20x2.0 at 300 m, 25x2.3 at 100 m). Pipe has a 50-year design service life. Pallet/MOQ figures are confirmed per order. Request the coil spec sheet.

Product · Underfloor Heating Pipe

Underfloor Heating Pipe Supplier — PE-RT & PEX-a for Hydronic Radiant Floors

German-brand oxygen-barrier pipe engineered for wet, water-based radiant floor heating — not electric mats. EVOH barrier per DIN 4726, PE-RT and PEX lines in 16–32 mm, coils of 100–300 m built to run a full loop without splicing mid-slab, 50-year design service life.

Supplied in bulk and private label to wholesalers, radiant contractors and importers across North America and Europe.

Request UFH Pipe Samples → See Our Manifolds →

Trade & wholesale supply only — not electric floor mats. Hitze does not sell single lengths at retail.

Hitze PE-RT heating pipework in a boiler and utility room with tank, pump and expansion vessel

EVOH · DIN 4726 · 50-Year Life

The Range

See the Radiant-Floor Line — Coils, Barrier, Manifold

Oxygen-barrier PE-RT and PEX-a for wet radiant floors, in the four heating colours and the sizes contractors actually loop. (Product photography is being finalized; captioned frames show the exact shots on the way.)

Hitze PE-RT heating pipe run in a boiler and utility room with tank, pump and expansion vessel — PE-RT heating pipe on the plant — boiler room run

PE-RT coil (red) — top-down full roll

Radiant floor loop laid on insulation clips — pre-pour

Cut cross-section — EVOH oxygen-barrier multilayer wall

Manifold connection — 16mm PE-RT into brass outlets

Hitze cartons, drums and yellow coils stacked in the warehouse ready for dispatch — Coils & cartons — stocked, container-ready

Red Orange Black Pink

Material Choice

PE-RT or PEX-a? Both Hydronic, Both Oxygen-Barrier — Here’s How to Stock Them

For radiant floor heating you have two workhorse materials. The difference is coiling behaviour, connection method and price point — not whether they’re safe for a closed loop.

PE-RT (raised-temperature polyethylene) coils easily, is economical, needs no cross-linking proof, and is the volume choice for slab loops — most wholesalers stock it as the core line. PEX-a adds thermal-memory shape recovery (kinks recover with heat) and works with cold-expansion fittings, favoured on jobs that want that connection method. Both are hydronic (water), both carry an EVOH oxygen barrier, and both pair with our manifolds.

Spec	PE-RT	PEX-a
Best for	Slab / radiant floor loops, volume supply	Expansion-fit systems, kink-recovery jobs
Coiling	Very easy, flexible	Easy, with thermal memory
Connection	Press / push-fit / compression	Cold-expansion + press / compression
Oxygen barrier	EVOH per DIN 4726	EVOH per DIN 4726
System	Wet / hydronic	Wet / hydronic
Standards direction	PE-RT to ISO 22391 / ASTM	PEX to EN ISO 15875 / ASTM F876

PE-RT coil beside PEX-a coil — cut section showing EVOH layer

Full material and dimensional data — exact grades and standard listings — is provided in the TDS pack. Standard and certificate numbers available on request.

Not sure which line fits your market? Request UFH pipe samples and we’ll include both — decide with the coil in hand.

Request UFH Pipe Samples →

EVOH · DIN 4726

Why the Oxygen Barrier Decides Whether the System Survives

In a sealed hydronic loop, oxygen is the enemy. Ordinary polyethylene lets oxygen diffuse straight through the pipe wall into the water — and that dissolved oxygen corrodes everything metal behind it.

That dissolved oxygen attacks every ferrous and metal component — the boiler heat exchanger, the pump, the manifold — and you get sludge, corrosion and warranty callbacks that surface years later. An EVOH oxygen-barrier layer stops that diffusion. This is exactly why DIN 4726 specifies an oxygen barrier for underfloor-heating pipe.

Every Hitze UFH coil is built with an EVOH barrier per DIN 4726. It’s the difference between a pipe that just carries water and a pipe that protects the whole plant behind it.

Standard: EVOH oxygen barrier per DIN 4726
Construction: multilayer PE-RT / PEX with a dedicated EVOH oxygen-barrier layer
Protects: boiler, circulator pump, manifold and valves from oxidation corrosion
Applies to: both PE-RT and PEX lines, sizes 16–32 mm
Service life: 50-year design service life
Test evidence: oxygen-permeation test results available on request

EVOH oxygen-barrier layer diagram — inner PE-RT / EVOH / outer wall, O₂ blocked

UFH Design Cheat-Sheet

Coil spacing, pipe length per m², bend radius, PE-RT vs PEX-a, and what “oxygen barrier per DIN 4726” actually means on a spec sheet. Email required.

Get the Cheat-Sheet →

Speccing a job and need the barrier data in writing? Request the DIN 4726 evidence — oxygen-barrier test results available on request.

Sizes & Coils

Coil Sizes & Lengths — Run the Loop Without Splicing Mid-Slab

Contractors lose time and trust when a coil runs out in the middle of a slab. We size UFH coils so a full loop lays in one run.

Our EVOH oxygen-barrier PE-RT & PEX floor-heating pipe runs from 16mm (the radiant-floor default) through 20mm, 25mm and 32mm, in the wall thicknesses below, with coils from 100 m to 300 m to match typical loop lengths per market.

Size (OD × wall, mm)	Diameter	Wall	Coil length
16 × 2.0	16mm	2.0mm	200 m / coil
16 × 2.2	16mm	2.2mm	100–300 m / coil
20 × 2.0	20mm	2.0mm	300 m / coil
20 × 2.3	20mm	2.3mm	100–300 m / coil
20 × 2.8	20mm	2.8mm	100–300 m / coil
25 × 2.3	25mm	2.3mm	100 m / coil
25 × 3.5	25mm	3.5mm	100–200 m / coil
32 × 3.0	32mm	3.0mm	100 m / coil
32 × 4.4	32mm	4.4mm	100 m / coil

Coils stacked with size & length labels facing out — 16 / 20 / 25 / 32mm

Spec	Value
Diameters	16 / 20 / 25 / 32 mm
Wall	2.0 – 4.4 mm (see size table)
Coil lengths	100 – 300 m per coil (e.g. 16×2.0 = 200 m, 20×2.0 = 300 m, 25×2.3 = 100 m, 32×3.0 = 100 m)
Material	Multilayer PE-RT / PEX with EVOH oxygen barrier
Service life	50 years design service life
Standards	EVOH oxygen barrier per DIN 4726
Color / marking	Red / orange / black / pink (print-line marking spec: coming soon)
Max operating (bar @ ℃)	Long-term rating available on request
Bend radius	Minimum bend radius (×D) available on request
Packaging / pallet	Coils per pallet / MOQ: coming soon

Red Orange Black Pink

Full coil table with exact per-size lengths, pressure/temperature ratings and pallet/MOQ figures is in the spec pack — request it below.

Request the Coil Spec Sheet →

Pipe + Manifold

One System: Pipe + Manifold, Sized to Match

A radiant floor isn’t a pipe — it’s a system. Sell the system, not a bag of mismatched parts.

Our 16mm and 20mm UFH pipe is dimensioned to pair cleanly with Hitze brass and stainless-steel underfloor-heating manifolds, so your customer gets loops, flow-setters and connections that actually fit each other. For private-label brands and importers, that means you sell a complete radiant floor package under your label.

Pipe diameters matched to manifold outlet sizes (16 / 20mm)
Brass and stainless manifold options
Consistent connection method across the system

See Our Manifolds → Talk to Us About System Supply →

Hitze four-outlet distribution manifold for underfloor heating loops — Distribution manifold — matched to 16 / 20mm pipe

Wet vs Electric

Wet (Hydronic) vs Electric — We Supply the Water Side

“Underfloor heating” and “radiant floor heating” cover two very different systems. We’re on one of them.

Electric systems use resistance cables or mats under the floor. Wet / hydronic systems circulate warm water through pipe loops — driven by a boiler or heat pump — and that’s the whole point of a slab-embedded radiant floor: larger areas, better running economy and pairing with modern heat pumps.

Hitze supplies the wet, hydronic side only — PE-RT and PEX-a pipe, manifolds and fittings. We do not supply electric floor mats or cables. If your project is water-based radiant heating, you’re in the right place.

Hitze pipe extrusion line producing heating pipe in the factory — Extrusion line — where the hydronic coil is made

1974German brand, founded

118+Countries supplied

50-yrDesign service life

DIN 4726EVOH oxygen barrier

Trade & wholesale supply only. This is a manufacturer/supplier page for hydronic UFH pipe — we don’t retail electric floor mats to consumers. Looking to stock or private-label wet radiant pipe? Read on.

Request UFH Pipe Samples →

FAQ

Underfloor Heating Pipe — Buyer FAQ

Do your underfloor heating pipes really have an oxygen barrier?

For the Contractor / InstallerYes. Every PE-RT and PEX-a coil carries an EVOH oxygen-barrier layer per DIN 4726, which blocks oxygen from diffusing through the pipe wall into the loop. That protects your boiler, pump and manifold from oxidation corrosion — the failure that shows up as sludge and callbacks years later. Oxygen-barrier test data is available on request.

PE-RT vs PEX-a — which line should I stock as my core?

For the WholesalerStock PE-RT as your volume core: it coils easily, is economical, needs no cross-linking proof and suits most slab radiant loops. Add PEX-a for customers wanting thermal-memory kink recovery and cold-expansion fittings. Both are hydronic and both carry the EVOH oxygen barrier, so your shelf stays consistent on the safety spec.

What coil length do I get, and can I run a full loop?

For the ContractorWe size coils so you can lay a full loop without splicing mid-slab, in 16 / 20 / 25 / 32mm diameters. Coils run from 100 m to 300 m depending on size — for example 16×2.0 comes at 200 m, 20×2.0 at 300 m and 25×2.3 at 100 m per coil. Tell us your typical loop length and we’ll match the coil.

Can I get PE-RT under my own label, matched to a manifold?

For the Importer / Private-Label BrandYes. We supply PE-RT and PEX-a UFH pipe with EVOH oxygen barrier for private label, dimensioned to pair with our brass and stainless manifolds so you sell a complete radiant system. MOQ, coil lengths and cert support (cUPC / NSF / DVGW / WRAS direction) are confirmed per program — MOQ and starting coil length: coming soon. Request the TDS pack.

Which standards do your UFH pipes meet?

For the MEP / Spec BuyerOur underfloor heating pipe is built to align with the relevant NA and EU standards — EVOH oxygen barrier per DIN 4726, PE-RT to ISO 22391 / ASTM, PEX to EN ISO 15875 / ASTM F876, with cUPC / NSF / DVGW / WRAS support for potable-adjacent and market listing. Specific certificate and listing numbers are available on request.

Still speccing? Get the UFH Design Cheat-Sheet for coil spacing and length-per-m², or request UFH pipe samples to test the coil yourself. See also how our multilayer & oxygen-barrier pipe is built and our underfloor heating manifolds.

Get Started

Request UFH Pipe Samples & the Cert Pack

Tell us your sizes, material (PE-RT / PEX-a), coil lengths and target market — we reply with pricing, MOQ and the DIN 4726 oxygen-barrier documentation for your region.

Request a Quote → Cert Pack →