Armaflex Self Seal Class O Insulation 22mm x 9mm

If the pipe is already in, Armaflex Self Seal Class O Insulation with a 22mm bore and 9mm wall saves threading lengths on from the end. It opens up, goes round 22mm copper or plastic pipe and sticks shut along the pre-glued seam.

Where 9mm Armaflex self seal insulation suits

Most domestic heating mains leave the boiler in 22mm, so this is the bore for the primary runs. The 9mm wall is the lighter option, best where the pipe sits inside heated space and room is tight. In a cold loft or garage, step up to a thicker wall. Being closed cell, the foam resists water vapour, so it keeps working on cool pipes too.

• Bore: 22mm
• Wall thickness: 9mm
• Finished size: about 40mm across
• Length: 2m, pre-slit with self-adhesive strips

Other sizes sit in our pipe insulation range.

Push each length tight to the last one so there is no gap. Then glue those end joints, not just the long seam, using Armaflex adhesive or tape for the neatest finish at bends and tees.

Buying 22mm x 9mm pipe lagging in Glasgow

Pick one up at Plumb Parts, 555 South Street, Glasgow G14 0QX. Serving Mon-Fri 8am-5pm and Sat-Sun 8am-1pm. Or send your order online.

Specification

• Brand: Armaflex
• Range: Class O Self Seal
• Maker code: AF-CO-09X022-A
• Material: Closed cell elastomeric foam
• Connection: Pre-slit tube with self-adhesive seam
• Sizes: 22mm bore, 9mm wall, 2m long
• Standard or approval: Class O, as named
• Suitable for: Heating, hot and cold water pipework
• Pack quantity: One 2m tube

Common Questions

What size pipe insulation do I need for 22mm pipe? Match the bore to the outside of the pipe, so 22mm copper or plastic pipe takes this 22mm bore. The 9mm is the wall thickness, the slim option for heated areas or tight spots behind boxing.

How do I insulate copper pipes that are already fitted? Wipe the pipe clean and dry, open the pre-slit tube over it, peel the backing off the strips and press the seam shut from one end. Butt each length tight to the next and glue the end joints with Armaflex adhesive.

Can I use this on copper hot water pipes? Yes, it’s made for heating, hot and cold water, and chilled and refrigeration pipework too. Allow about 40mm across once it’s on when you’re choosing clips.

Why insulate copper pipes? On heating and hot pipes it cuts wasted heat, and on cold pipes it stops condensation dripping. Lagging also gives some protection against frost.

Can insulation touch copper pipes? Yes, Armaflex is made to sit right on the pipe. Just make sure the pipe is clean and dry before you close the seam.

What fire rating does Armaflex Class O have? It’s rated Class O to BS 476 Parts 6 and 7, which is why it’s often specified by name on commercial jobs.