Protecting pipes chased into block walls

[Hargjus]

Hello forum. First time user here (and now registered)! Can someone please advise the best/recommended method to protect 15mm copper pipes that I will be setting back into a wall to feed radiators in my house. I've already chased the walls, which are standard concrete blocks, but I'm aware of the long term issues that can occur with copper pipe coming into direct contact with concrete. Any advice would be much appreciated.

 

[Masood]

Thank you for registering, and welcome to the forum. Climaflex lagging (other brands are available!) will do just fine. Make sure you tape up the joint to prevent cement seeping through the slit.

 

[PhoenixServices]

Or hair felt lagging. Smells weird though.

 

[Masood]

Or hair felt lagging. Smells weird though.

I would not use hair felt. It's got very little insulation value compared with closed-cell foam, and it's porous so cement can seep through. There are a whole bunch of blocks of flats near me with central heating pipes buried in concrete, that are all beginning to pinhole. All wrapped in hair felt lagging, all got cement crusted on the pipes and joints.

 

[ShaunCorbs]

Or if you haven't got the wall thickness to chase deeper the black duck tape will be ok give it a couple of layers tho

 

[gmartine]

Stormguard do an adhesive insulated wrap if you don't have the room for closed cell foam.

Pipe Wrap Insulation Tape 4.5m - Toolstation

 

[Howsie]

Or use plastic of MCLP.

 

[Hargjus]

Nice one, thanks all for your responses - very helpful! Shall definitely use this forum again.

 

[thereisawizza]

Nobody likes Denso anymore then? 🙂

 

[snoopy8888]

Nobody likes Denso anymore then? 🙂

Denso who ?
Washington ?

 

[Gasmk1]

denso is digusting stuff to use

 

[macackau]

Good old Denso. Have a Stanley knife in the van that I use just for it. Very messy though.

 

[Millsy 82]

Thank you for registering, and welcome to the forum. Climaflex lagging (other brands are available!) will do just fine. Make sure you tape up the joint to prevent cement seeping through the slit.

Really? How much of the wall are you taking out? Got to be 33mm minimum for a 15mm pipe?

I use the tape they use for damp proof membrane.

 

[Spanner2k7]

If you are just protecting from corrosion then use a 50mm wide pvc tape and when you wrap it overlap it by 50%. When chasing out use have a maximum :-
1/3 when chasing vertical
1/6 when chasing horizontal
So for a 100mm block wall you can chase 33mm vertical and 16mm horizontal.

 

[oz-plumber]

Why not use plastic coated copper - more expensive I know, but it also allows the pipe to expand and contract during the heating cycle

 

[JCSPLUMBING]

Or if you haven't got the wall thickness to chase deeper the black duck tape will be ok give it a couple of layers tho

Make sure it's only black duct tape as grey duct tape reacts with the copper and it melts 😛

 

[AlexGas]

Insulation Tape Black 50mm x 33m - Toolstation

 

[Spanner2k7]

Make sure it's only black duct tape as grey duct tape reacts with the copper and it melts 😛

Is the adhesive on the black tape different to the grey duct tape?

 

[ShaunCorbs]

Make sure it's only black duct tape as grey duct tape reacts with the copper and it melts 😛

The black stuff is waterproof so only use that

 

[ShaunCorbs]

Is the adhesive on the black tape different to the grey duct tape?

Grey isn't water proof