PE-RT Oxygen Barrier Pipe: 5-Layer Underfloor Heating Guide

Oxygen-barrier PE-RT pipe contains an EVOH barrier layer designed to limit oxygen permeation into a closed-loop heating system. The barrier requirement should be checked carefully in underfloor heating projects that contain pumps, boilers, manifolds and other metallic components.

What does an oxygen barrier do in PE-RT pipe?

Oxygen entering through a plastic pipe wall can increase the corrosion risk for ferrous components in a closed circuit. The EVOH layer helps limit this permeation. If a project specification refers to DIN 4726 or another oxygen-permeability criterion, request the current product data sheet and applicable conformity documents.

Standard PE-RT vs 5-layer oxygen-barrier PE-RT

Option	Main feature	What to verify
Standard PE-RT	Flexible pipe for heating and warm-water applications	Whether the project requires an oxygen barrier
5-layer oxygen-barrier PE-RT	Multilayer construction with an EVOH barrier	Required standard, system components and application class
PE-RT with conduit	Spiral conduit for mechanical protection and routing	Whether conduit and oxygen barrier are each specified

Underfloor heating pipe selection checklist

Pipe dimension and wall thickness
Design temperature and operating pressure
Oxygen-barrier requirement
Loop length, pipe spacing and hydraulic calculation
Compatibility with the manifold and connection fittings
Pressure test and installation procedure before screed
Required standard, certification, packaging and total length

Loop length and pipe spacing are not fixed product values. They must be determined by a qualified designer from the heat-loss calculation, floor finish and system design.

SPK PE-RT product options

Send the destination country, total length, dimensions and specification through the SPK export enquiry form for product selection and a quotation.