First time DIY'er installing pipe run for central heating

[shabbaranks]

Hi peeps... Ive been browsing this forum for some time and thought Id bite the bullet and sign up.

We've bought a bungalow which needs a fair bit of work, Ive already chased the walls ready for the central heating pipe work. Next step once the pipe turns up is to run them - can anyone tell me the best way to run the pipes up in the loft in a way its easy to get to your feed and return? Ive seen the plastic clips which lay flat next to each other but nothing where by they sit horizontally. Am I missing a technique here?

Thanks!
shabba

 

[mfarrow]

You'll need to T into them and cross over one or t'other if that's what you mean?

Use a pipe bender or, as I'm no good at them and don't own one, I use 45 angles.

 

[shabbaranks]

Cool thats what I thought, I just wasnt sure if the bends would effect the flow but I guess they're only gradual bends it shouldnt effect it too much?

Also when I run the copper pipes down the chased wall, do I need to apply anything before the pipe is in and before the wall is feathered to help stop any cracking?

Cheers

 

[AlanE]

If your embedding copper pipes in plaster/cement then the pipes need covering or they will corrode.

Chase pipes in wall wrapped in tape, then cover with layer of felt insulation and finally cover with a strip of expanded metal and plaster onto that.

This way the pipes will be protected and also be free to expand and contract without affecting the plaster finish.

 

[shabbaranks]

Sorry I should have made myself a little clearer, Ive bought some of those foam sleeves to wrap around the pipe which will be in the walls 15mm - Ive actually bought the 22mm ones for the pipe runs in the loft also.

I dont know why but Im sure someone said apply pva or something else to the chases to help stop them cracking when they are plastered over?

 

[mfarrow]

The PVA stops all the moisture being absorbed into the walls when you apply the plaster to them. But that's a plastering issue rather than a plumbing issue.