Greentherm Multilayer Pipe

Multi-layer pipes are an advanced solution in plumbing and heating systems, offering a combination of the best features from plastic and metallic pipes. Composed of two layers of cross-linked polyethylene (PEX), two layers of adhesive, and an intermediate layer of aluminum, these pipes are a significant evolution from traditional PEX pipes.

The incorporation of an aluminum layer provides multi-layer pipes with unique advantages. On one hand, they possess the flexibility, lightness, corrosion resistance, ease of handling, and long lifespan typically associated with plastic pipes. On the other hand, they also offer the high-temperature and pressure resistance, oxygen diffusion tightness, and shape retention of metallic pipes.

A: PEX layers | B: Adhesive layers | C: Intermediate aluminium layer


RBM, manufactures using the best raw materials and the most modern manufacturing and quality control methods. There staff is composed of qualified professionals with the necessary experience so as to guarantee that RBM’s client always has first class products.

RBM’s Multi-layer pipes consist of both insulated and non insulated versions allowing for them to be using in any most applications. With an expected life span of 50+ years when kept with in there specifications.

PE-RT RBM Tita-fix multilayer pipe.
Multilayer pipe for underfloor heating in polyethylene, aluminium and polyethylene.

Welded aluminium layer type A
Composition: PE-RT/Al/PE-RT White

  • Poper: 10 Bar
  • Tmal: 95 °C
  • Duration at operating conditions ~ 50 years
  • Type: PE-RT
  • Sizing: ranges from 16×2 to 40×3.5 (mm)
  • Aluminium th. ranging: .2-.5(mm)

PE-RT RBM Tita-fix multilayer pipe externally insulated with closed cell expanded polyethylene conduit, CFC-free, flame retardant.
Pipe features as in code 1545-1546.

  • Insulating conduit features:
  • Density 35 kg/m³
  • Thermal conductivity at 40 °C
    only conduit: 0.038W/mK
  • conduit + pipe (average value): 0.069 W/mK
  • Steam permeability μ 5.482
  • Insulation thickness 6 mm
    Type: PE-RT
  • Sizing: Ranges from 16×2 – 32×3 (mm)
  • Aluminium th Range: .2 – .4(mm)