Temporary pipework while working on CH (Ed.)

[stephanh]

I have just started on converting existing bedroom into new bathroom. At present the copper pipes for central heating run in floor screed (1960's bungalow) which I am not a fan of. Beginning of next year I shall start on planned extension (hopefully, not yet received planning approval) and then have all central heating pipes run through the roof void. Between now and then I am left with trying to add new radiator for bathroom by teeing off existing pipes (at 3 way valve) just before they vanish into the screed and take them up into the roof void and over to bath area.
Will that work??

 

[terryplumb]

What exactly do you mean by 'teeing off existing pipes at 3 way valve "?

 

[stephanh]

The 3 way valve is close to the floor and is the only location I can join the flow pipe (below the valve itself). The return pipe I can access in the same area.

 

[johnny2007]

Do you mean tee fitting?
So you can add a pipe to an existing one?

 

[stephanh]

Yes, exactly. Add tee fitting before the pipe enters the floor then take the new added pipe up into loft and over to bathroom.