Hi,
I have a sealed CH system and I have a valve which I don't know what its purpose (See pictures below) is. The pipe that feeds in to it is the Primary return of the HW but it also can go below, I guess to the boiler. Could you please advice me what is it for and shall I keep it open or closed?
PS It can be turned endlessly clockwise and anti-clockwise.
Thanks in advance for your help
Closer View
I have a sealed CH system and I have a valve which I don't know what its purpose (See pictures below) is. The pipe that feeds in to it is the Primary return of the HW but it also can go below, I guess to the boiler. Could you please advice me what is it for and shall I keep it open or closed?
PS It can be turned endlessly clockwise and anti-clockwise.
Thanks in advance for your help
Closer View