Pre-Insulated Multilayer Pipe – Insulated PEX-AL-PEX Pipe for Heating & Plumbing

Discover our range of high-quality pre-insulated multilayer composite pipe, designed to reduce heat loss and provide reliable performance in water-based heating and plumbing installations.

At Underfloor Heating Trade Supplies, we stock NovaTherm insulated PEX-AL-PEX pipe in 16mm, 20mm, 25mm and 32mm diameters, available in convenient coil lengths and red or blue insulation.

Our pre-insulated pipe is particularly well suited to distributing heated water between components in central heating, underfloor heating and compatible heat pump installations, where minimising unwanted heat loss is important.

Why Choose Pre-Insulated Multilayer Pipe?

Combining the strength and dimensional stability of aluminium with the flexibility of plastic pipe, multilayer composite pipe provides a practical solution for modern heating and plumbing systems.

The surrounding insulation helps limit unwanted heat transfer, making it particularly useful when routing pipework through unheated spaces or between heating system components.

Key benefits include:

• Reduced heat loss – Factory-applied insulation helps retain heat as water travels through the pipework.

• Ideal for heating distribution – Suitable for properly designed central heating, underfloor heating and compatible heat pump systems.

• Multilayer construction – Combines plastic and aluminium layers for strength, flexibility and dimensional stability.

• Convenient installation – Supplied in coils to help installers create efficient pipework runs.

• Choice of diameters – Available in 16mm, 20mm, 25mm and 32mm to suit different system requirements.

• Red and blue insulation – Helps distinguish different pipe runs during installation.

• Professional-quality pipework – Suitable for trade installers and domestic renovation projects.

Pre-Insulated Pipe for Heat Pump Installations

Heat pump systems benefit from carefully designed pipework that minimises unnecessary heat loss between the heat source and the heating distribution system.

Our NovaTherm pre-insulated multilayer pipe can provide a practical solution for compatible heat pump installations, including connections to heating distribution manifolds, buffer vessels and other system components.

Correct pipe diameter and insulation performance are essential to achieve the required flow rates and minimise heat losses.

Available Pre-Insulated Pipe Sizes

Choose from our range of insulated multilayer pipe:

• 16mm Insulated Pipe – 100m coils, red or blue

• 20mm Insulated Pipe – 50m coils, red or blue

• 25mm Insulated Pipe – 50m coils, red or blue

• 32mm Insulated Pipe – 25m coils, red or blue

All pipe sizes should be selected according to the heating system design, operating conditions and required flow rates.

Buy Pre-Insulated Pipe from Underfloor Heating Trade Supplies

Whether you're a professional heating engineer, heat pump installer, plumber or homeowner undertaking a renovation, we offer competitively priced insulated multilayer pipe backed by knowledgeable customer support.

Trade customers can also benefit from competitive trade discounts, making us an ideal supplier for regular heating and plumbing installations.

Browse our full range of pre-insulated pipe above, or contact our friendly team for expert product advice.