Armaflex Class O Pipe Insulation 22mm x 25mm

For 22mm pipe that needs heavy protection, Armaflex Class O Pipe Insulation 22mm x 25mm gives the full 25mm wall of closed-cell elastomeric foam. It goes on cold water mains in garages and outbuildings, and on chilled lines where condensation would otherwise run along the pipe and drip.

What Armaflex Class O Pipe Insulation 22mm x 25mm is for

Burst pipes in a cold snap usually start at the exposed runs, so that is where the thickest lagging pays back. The sealed foam cells keep moisture out, so the tube does not soak up water and lose its effect over time. That also means it stays clean to handle, with no loose fibres when you cut it.

• Fits 22mm copper or 22mm plastic
• Thick 25mm wall
• About 72mm diameter once on
• Sold as 2 metre lengths

Plan for the size. At roughly 72mm over the foam, it needs bigger holes through walls and more space between neighbouring pipes, so it is worth checking before you buy a full run. Where the pipe meets a valve or tee, cut small pieces to fit and glue them in rather than stretching the tube. You will find other bores and walls under pipes, hoses and insulation.

Collect from Plumb Parts in Glasgow

It is a collection item, so buy online and come for it, or ask at 555 South Street, Glasgow G14 0QX. Hours are Mon-Fri 8am-5pm and Sat-Sun 8am-1pm.

Specification

• Brand: Armaflex
• Range: Class O pipe insulation
• Material: Flexible closed cell elastomeric (nitrile rubber) foam
• Sizes: 22mm bore, 25mm wall, 2m lengths
• Standard or approval: Class O fire performance, as named
• Suitable for: Insulating 22mm pipe

Common Questions

Where is 22mm x 25mm Armaflex usually fitted?

On 22mm chilled water, cold mains in unheated spaces and pipes where the drawings ask for a 25mm wall. It gives the most protection listed for 22mm pipe.

Does a thick wall need a bigger pipe clip?

Yes, the fitted outside size grows with the wall, so 25mm Armaflex needs clips or brackets sized for the insulated pipe. Plan the brackets before the pipe goes up.

Can I tape the seams instead of gluing them?

Armacell recommend their adhesive for seams and joints, and tape alone can lift over time. On chilled pipe, glued joints are what stop condensation.