Red gate valve

[John Cotton]

I'm not a plumber but having jusy had a new kitchen the plumber seemed unsure whether the red gate valve next to the c/h pump and cylinder should be open or closed.

Any advice ? (some of my upstairs rads dont now work and there seems to be the sound of bubbles rising in the cylinder when the heating starts).

John

 

[John Cotton]

Its between plastic box which says actuator on it and the cylinder, (where it connects part way up where the pipe coming out also has a bit sticking up vertically as well as coming out horizontally to the gate valve).

 

[John Cotton]

Thanks I'll try it.

Also, I have an old rad that wont bleed, as the bleed screw is rounded.

Any suggestions other than changing the rad ?