remove downstairs heating

[Al666]

Hi,

I'm currently pulling up the floor downstairs for underfloor heating and was wondering what to do with the heating pipes. I am having underfloor heating fitted to the entire downstairs so I need to take the pipework out ready for the plumber as I am preparing most of it myself. I have a combi boiler and the pipes go upstairs to the radiators and then come downstairs, do I cut the pipes and terminate them or do they need to be joined together? I have located the 22mm pipes where they start heading downstairs. I don't know much about heating but can fit some compressions to the pipes after draining the system.

Thanks in advance.

 

[denso13]

Just cap them, no need to have them linked.

 

[Terrywookfit]

Don't leave "Dead legs" full of air.

 

[Al666]

Just cap them, no need to have them linked.

cheers

 

[Al666]

Don't leave "Dead legs" full of air.

dead legs? Is that the space between the last radiator and the end of the flow/return?

 

[Terrywookfit]

Unused pipework off the main flow and return.
Cap the pipes as close to F/R as practical.

 

[Al666]

Unused pipework off the main flow and return.
Cap the pipes as close to F/R as practical.

Is it better to use a reducer off the end of the 22mm going to the 15mm connection to the radiator or would that be silly?

 

[Terrywookfit]

Not sure what you mean.
Cap in nearest convenient place.

 

[Al666]

Not sure what you mean.
Cap in nearest convenient place.

well the flow and return are both 22mm copper pipe and the radiators feed from them at 15mm. Could I reduce the end of the flow and return to 15mm to feed the final radiator or is capping it a better way?

 

[Terrywookfit]

What do you mean by final radiator??

A sketch would be handy.

 

[Al666]

What do you mean by final radiator??

A sketch would be handy.

I mean the last radiator on the flow and return pipes before it needs to be capped.

 

[Terrywookfit]

Still No comprende !!!

 

[Al666]

Still No comprende !!!

I'll cap it as suggested!!!

thanks

 

[Madrab]

The pipework feeding the last rad must already drop to 15mm anyway? The feeds you are doing away with, cut back as close to the main 22mm flow and return pipes as possible and then cap each one there.

 

[Al666]

great, cheers