Pipes and fittings

Composite pipes

The white Danfoss FH composite pipe is 100% oxygen-tight, temperature-resistant, and highly flexible. It features an aluminum core, coated inside and out with polyethylene (PE-RT) layers, permanently bonded via adhesive.
The octene side chains in PE-RT provide properties similar to cross-linked polyethylene (PE-X), delivering excellent long-term hydrostatic strength at high temperatures without crosslinking.
The aluminum layer ensures the pipe retains its shape once bent, making installation easier and maintaining oxygen-tightness for a long-lasting floor heating system.
Manufactured in accordance with ISO 21003.

FH PE-RT pipes

The Danfoss PE‑RT pipe is a strong, 5‑layer floor heating pipe with a built‑in EVOH oxygen barrier.
During manufacturing, all layers are permanently bonded, so they won’t separate over time.
The special PE‑RT material has octene side chains in its structure. This gives it strength similar to cross‑linked PE (PE-X) – meaning it can handle high temperatures and pressure for many years – but without the extra crosslinking process.
The non-crosslinked polyethylene with raised temperature resistance (PE-RT) is used in accordance with ISO 22391.

Fittings

PE-Xa pipes

The Danfoss PE‑Xa pipe is a high quality, 5‑layer floor heating pipe with a built‑in EVOH oxygen barrier.
During manufacturing, all layers are permanently bonded, so they won’t separate over time.
PE-Xa (peroxide) pipes offer greater flexibility than PE-X pipes cross‑linked by other methods.
They can be cold‑bent and curved easily without special tools, reducing the diameter of curves and saving installation time.
The EVOH oxygen barrier is a thin layer of ethylene vinyl alcohol (EVOH) that stops oxygen from passing through the pipe wall.
This prevents oxygen from entering the system water, which can cause corrosion in metal components. By reducing corrosion, the barrier helps extend the service life of the entire installation.
The 5 layer cross linked polyethylene pipe (PE-Xa) with oxygen barrier is used in accordance with ISO 15875.