Uninsulated PP-R

Large diameter pipework

#nextlevelnetworks

Uninsulated PP-R

Large diameter pipework

#nextlevelnetworks

Efficient. Durable. Reliable.

As heat network design evolves towards lower carbon and more efficient energy distribution, ambient temperature networks are becoming increasingly popular. For applications where thermal losses are minimal or even beneficial, uninsulated PP-R pipework offers a durable and cost-effective alternative to traditional pre-insulated solutions.

PP-R offers reliable underground distribution pipework combining corrosion resistance, long service life, and large diameter capabilities.

Battery cooling case study

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Why choose uninsulated PP-R?

Long-service life: designed for long-term buried infrastructure applications, offering excellent durability and reliability.

Large diameters: SDR 11 up to 400mm and SDR 17.6 up to 630mm.

Wide range of applications: from commercial projects like campuses and hospitals to new build housing.

REHAU service and advanced support: support at every stage of the project.

Applications

Uninsulated systems are ideal for delivering low-temperature energy through high-performance polymer pipe systems.

These can include:

Ambient loop heat networks (5th generation): Networks operating at approximately 10–30°C where central energy sources are shared between multiple buildings.

District cooling networks: Closed-loop systems distributing cooling energy between buildings and local energy centres.

Speak to the experts

Whether you're designing an ambient loop network, district cooling scheme, or energy-sharing infrastructure, our technical specialists can help identify the optimal pipework solution.

System design support
Hydraulic calculations
Product selection
Installation guidance

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News

26.08.2026 Next Level Heat Networks - Glasgow event

Join industry leaders, local authorities, developers and consultants in Glasgow to discuss innovation, regulation and future opportunities across Scotland's growing heat network sector at the Next level Heat Networks event in September.

15.07.2026 REHAU takes home UK District Energy Association - Supplier of the Year

REHAU has been named Supplier of the Year at the UKDEA Heat Networks Expo, recognising our commitment to innovation, technical excellence and outstanding customer support across the UK heat network sector.

20268 REHAU_Next Level Service_DH Concept 1 - 100110247

13.07.2026 Enhancing Service With New District Heating Software

REHAU has launched an advanced district heating design support package, supporting ESCOs and consultants with hydraulic modelling, pipe sizing, material selection and TS1-compliant heat network design.

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