Can I add another radiator on this microbore manifold?

[Dave Preston]

I have what appears to be a single pipe system? with microbore manifold downstairs, and I'm assuming another upstairs under floorboards, both with 3 radiators. The photo shows the downstairs manifold, and looking at the way the other radiators are connected, is there any reason why connecting another radiator to the 2 spare connections won't work?
Is the valve underneath for balancing or a drain?

 

[Deleted member 120897]

I could be wrong, but would say that is a 2 pipe system and the valve is a manual bypass.

 

[ShaunCorbs]

The manifold is split / capped in the middle so two pipe system you can use the blanked off ports for a new rad

 

[Dave Preston]

The manifold is split / capped in the middle so two pipe system you can use the blanked off ports for a new rad

Ah, I see so the flow is on one side, and the return on the other of a disc in the middle, clever