I'm not sure if this is the same question as this, but I'll ask anyway.
I have a leak near the knob at my main water supply. The picture shows the green oxidation. Is there any DIY solution, or do I need to call a plumber/municipality? If I just call the water company to shut the line off to the house could I replace the handle and nut myself?
I don't have a water pressure regulator for this line. The water meter often makes an audible ticking noise. Can water pressure that is too high cause this kind of leak? I don't know what the pressure actually is, but I can buy a gauge.
EDIT: the other thing is the 2 black wires behind the valve....what are they? and if i use a channel-lock and accidentally contact with the exposed areas of the wire, then what? scary no??