Designed for professional underfloor heating and wet heating installations, the Multilayer 16 x 500 m Plain Underfloor Heating Pipe brings durability, flexibility and reliable performance to a wide range of heating applications. This plain, multilayer composite pipe features a tough PE-RT (Polyethylene of Raised Temperature Resistance) inner and outer jacket with a butt-welded aluminium core, delivering the strength and thermal stability installers demand.
The aluminium layer provides diffusion tightness and minimal thermal expansion, meaning the pipe holds its shape and performs efficiently under changing temperature conditions — ideal for both new build and retrofit underfloor heating systems. Its continuous 500 m coil length helps reduce joints and fittings on site, simplifying layouts and saving labour time.
Thanks to its robust construction and good flexibility, this multilayer pipe is well suited to wet underfloor heating loops, radiant wall/cooling circuits, central heating circuits and potable water applications where system endurance and long service life are priorities.
Key Features
Multilayer Construction: PE-RT inner and outer layers bonded with an aluminium core for strength and performance.
Butt-Welded Aluminium: Creates a strong, diffusion-tight barrier with minimal thermal expansion.
500 m Coil: Long continuous length reduces joins and saves installation time.
Flexible & Shape Stable: Easy to lay around bends and through service voids.
Versatile Use: Ideal for underfloor heating, central heating and potable water systems.
Professional Grade: Designed for robust performance in trade installations
Material: High Temperature Polyethylene (PE-RT) with aluminium layer
Construction: Butt-welded aluminium core with bonded PE-RT layers
Operating Pressure: Up to 10 bar (typical for multilayer heating pipe applications)
Temperature Capacity: Suitable for typical underfloor heating and central heating temperatures (installation dependent)
Application: Underfloor heating loops, radiant heating/cooling circuits, central heating and potable water systems
TJ’s Tip
For best results, plan your pipe route ahead of time and uncoil gradually to avoid kinks. Using continuous lengths from the 500 m coil reduces joints and fitting time, improving system integrity and long-term performance — especially important in underfloor heating loops where uniform heat distribution matters.
* Effective from 3 December 2025 * Free delivery on order over €400, applies to Small & Light, Large & Heavy items within zone 1 only.
Zone Indicator:
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Items under 20kg weight & under 2m long, (some fragile items may not be included e.g. glass/mirrors)
Large and bulky items Extra Large items
Zone 1 & 2 only
Wet & hazardous bagged, items over 20Kg weight & oversized; Euronics white goods, TVs of all sizes.
Large Paint items (6L / 6L+)
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Large hazardous items (6L+) - available for collection
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Old Appliance Collection:
When you buy a large appliance, we’ll collect your old one for free through WEEE Ireland. Please ensure it is uninstalled, disconnected, and ready for pickup. Collection is like-for-like and takes place at the front door or apartment entrance. Restrictions may apply based on access and item type.
At TJ O'Mahony we will exchange or refund any Retail unused product returned to us in its original condition within 30 days of receiving it (*)You can return any unused product to us in its original condition for a full refund or exchange within 30 days of delivery.
This right to return does not apply to products that are non stock and only available to order such as catalogued doors, catalogued bathroomware and mixed paints which are made especially for your order.
Please note that we are unable to accept returns on certain bagged building products and materials, including (but not limited to) hard wall, cement, bonding, slates, and ridges. We appreciate your understanding and recommend checking product requirements carefully before purchase.