The quad pipe combines 4 pipes, two for use with flow and return heating pipework, one for use with a hot water flow and second hot water pipe for the secondary circulation loop. The internal corrosion-resistant pipes are cross-linked PE-Xa (in accordance with DIN 16892/16893), with a red oxygen barrier included for the heating pipes (EVOH barrier in accordance with DIN7426).

The internal foam that supports and insulates the pipework is a CFC-free foam made from cross-linked PE-X with closed microcellular structure and has a minimal water absorption capacity of <1% (in accordance with DIN 53428). In the centre of the 4 pipes is a PE-X centre piece which guarantees an effective separation between flow, return, hot water and circulation pipes. A corrugated outer casing in PE-HD ensures protection to the piping system whilst allowing maximum flexibility.

The manufacturer advises the quad pipe system offers the following benefits:

• 4 pipes in 1 – saves money on materials
• Reduced trench size which reduces excavation costs
• One pipe to lay thus reducing labour costs
• Internal connections in one position
• Flexible solution offers a fast installation
• No specialist tools required for installation