I am not sure what this “lever” is off the oil tank filter. It is rigged open with what we call some “good ol’ Yankee ingenuity”. There is a wire suspended in the ceiling and runs towards the boiler through small pulleys, but does not connect to anything at the boiler.
-
Adam, it’s supposed to be this way. It’s a lever activated oil valve held up by a fusible link which melts during fire (releasing the lever) and shuts the oil supply to the burner. No yankee ploy here 
3 Likes
I see the OSV valve before the oil filter. Is this another oil safety valve? If so, is it redundant?
Yes, it is redundant, but it does not hurt. The first one (closest to the tank) makes the servicing easier.
1 Like
Thank you, now I Know.