Best practice for copper pipes (gas and water) in concrete/screed

[KevinD-A]

Hi,

Plumber has dug a trench in my existing solid kitchen floor and laid the following pipes -

15mm flow and return - covered whole pipe with hessian felt sleeve
15mm mains water - laid hessian felt sleeve on top of pipe (not around)
28mm gas - wrapped gaffer tape around the pipe.

I'm not convinced this is enough and so I was planning to ask he does the following


1. wrap hessian sleeving around all of the pipes ensuring they're covered

2. buy a PVC duct tape such as 3m 3903i or 3m Super 33+ tape and wrap this around the pipes (separate question but can this be applied directly onto the copper pipes?)

3. Pour kiln dried/paving sand in to cover the pipes before laying a dry-ish screed mix on top of the sand

I was also thinking about requesting the gas pipe is replaced using TracPipe

Any advice would be greatly appreciated (and help me sleep tonight!)

Cheers

 

[ShaunCorbs]

no you are right to be concerned

i would want them insulated and pvc/ waterproof duct-tape, or even better laid inside a pipe or duct

 

[Gareth Harris]

no water pipes should be embedded in the floor, if they are in a purpose made duct or chase or pipe in pipe, they are ok: http://www.legislation.gov.uk/uksi/1999/1148/schedule/2/paragraph/7/made

you can then cover the duct/chase with superficial finish: https://www.wras.co.uk/downloads/pu...eral/para_7_guidance_version_2_july_2014.pdf/

hope this helps.

 

[KevinD-A]

Thanks for help and advice so far all. So I'm thinking of, in addition to above, using some floplast type waste pipes, cutting a slot across those so I can pop those around the pipes and run some tape across those to seal the slit

 

[Gareth Harris]

Thanks for help and advice so far all. So I'm thinking of, in addition to above, using some floplast type waste pipes, cutting a slot across those so I can pop those around the pipes and run some tape across those to seal the slit

you can but purpose made trunking for this which incorporates pipe clips. it may be easier and give you a better/level finish.

i would also suggest that the main be kept away from the heating pipes to prevent heat transfer.

 

[Scott_D]

Ventilation may be required

 

[KevinD-A]

you can but purpose made trunking for this which incorporates pipe clips. it may be easier and give you a better/level finish.

i would also suggest that the main be kept away from the heating pipes to prevent heat transfer.

Hi Gareth,

Thank you for this.

Would you know the name of the trunking I should use for this?

Regards

 

[king of pipes]

I would use kuterlux plastic coated copper pipework for the heating flow and return and cold main pipework and track pipe for the gas supply . cheers kop

 

[KevinD-A]

Thank you KOP, by cold main pipework do you mean copper (within a pvc pipe) or alkathene/Blue MDPE pipe?
Cheers
KD

 

[ShaunCorbs]

http://www.plumbcenter.co.uk/wcssto...ang.all/hu/re/Yorkshire_Kuterlex_Brochure.pdf

 

[king of pipes]

As shaun has kindly quoted above kevin i just ordered a contractors pack 15m of 25mm gastite flexible gas pipe with fittings from sales@gas&waterpipelines.co.uk please be aware you need to be gas safe to work with this product. regards kop

 

[ShaunCorbs]

As shaun has kindly quoted above kevin i just ordered a contractors pack 15m of 25mm gastite flexible gas pipe with fittings from sales@gas&waterpipelines.co.uk please be aware you need to be gas safe to work with this product. regards kop

Don't you mean 28mm and how are you going to connect to copper if it's all in the floor ?

 

[king of pipes]

No joins in the floor shaun a adaptor to 1" BSP each end 300mm above ground sorted

 

[ShaunCorbs]

No joins in the floor shaun a adaptor to 1" BSP each end 300mm above ground sorted

View attachment 29858

Depends where the gas is fed from already if off existing in the floor or a in the wall meter box

 

[king of pipes]

Gas Meter to point of use new supply bud cheers kop

 

[KevinD-A]

Guys,

I've had a further thought on this and consider the following -

Have the gas copper replaced per KOP's suggestion above

For the remaining copper wrap that in hair felt and then wrap that in a 5mm closed cell polyethylene sheet. This should allow movement and protect from limestone?

Drop kiln dried sand in to cover the pipes and allow for any further movement/expansion then screed over the top.

Sound sensible? Any other thoughts?

 

[king of pipes]

No kevin do it properly do it once if you dont it will fail eventually i have seen the devistation caused just not worth the risk . cheers kop.

 

[KevinD-A]

Fair shout - thanks Shaun

Kev