I want to add a (smallish) radiator to the downstairs circuit, in the kitchen. The downstairs radiators, of which there are currently 3, are all fed by 10mm copper pipe.
The 22m flow and return come from the boiler, under the kitchen floor (actually passing underneath where I wish to place the kitchen rad) through the wall and into the back-room. They lead to manifolds which supply the 3 downstairs rads (10mm).
I have some 10mm pipe and 10mm tees and I was thinking of lifting the back room floor and tee'ing off the back-room radiator to supply the kitchen one (they're either side of the same wall), but it's my understanding that I shouldn't tee off 10mm as it will adversely effect flow.
Would I be best lifting the kitchen floor to access the 22mm flow and return and tee off that (pre-manifold)? If so, should I go 22x15x22 and supply the kitchen rad by 15mm? Or should I go 22x10x22 and stick with the 10mm? (Or even 22x15x22 and then reduce again from 15mm to 10mm?)
Can you even get 22x10x22 tees?
The 22m flow and return come from the boiler, under the kitchen floor (actually passing underneath where I wish to place the kitchen rad) through the wall and into the back-room. They lead to manifolds which supply the 3 downstairs rads (10mm).
I have some 10mm pipe and 10mm tees and I was thinking of lifting the back room floor and tee'ing off the back-room radiator to supply the kitchen one (they're either side of the same wall), but it's my understanding that I shouldn't tee off 10mm as it will adversely effect flow.
Would I be best lifting the kitchen floor to access the 22mm flow and return and tee off that (pre-manifold)? If so, should I go 22x15x22 and supply the kitchen rad by 15mm? Or should I go 22x10x22 and stick with the 10mm? (Or even 22x15x22 and then reduce again from 15mm to 10mm?)
Can you even get 22x10x22 tees?