Pre-Insulated Multilayer Pipe: Red flow, blue return, no lagging (video guide)

Multilayer pipe with insulation already fitted, red for flow and blue for return. Use it for runs like boiler or heat pump to the manifold, with no separate lagging to fit on site.

Here is how it fits and what to check, with the data sheet and install manual to download below.

Key facts

• Factory-fitted insulation, no lagging
• Red flow, blue return
• 7mm closed-cell PE foam, continuous vapour barrier
• Heating: up to 80°C continuous at 10 bar
• 16, 20, 25 and 32mm sizes

How to fit it

1. Order one red coil for flow, one blue for return
2. Cut square and trim back just enough insulation
3. Ream, chamfer, fit and press with U-profile jaws
4. Pressure test before closing the insulation
5. Close and tape every joint so the vapour barrier is unbroken

Buy it

The Pre-Insulated PEX-AL-PEX Multilayer Pipe is available from MaxHeatUFH. Order by 12pm on a working day for next working day UK delivery. Trade customers see their trade price when logged in.

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