I noticed this morning that one of my hose outlets is dripping. I don't use this particular one anyway, and winter's coming. So, I opened the valve, went into the basement, shut off THAT valve, and found that it's still leaking outside 4 hours later. Great.
The inside valve looks pretty straightforward. The supply pipe is horizontal and the valve forms a "T". It's got provision for removal via wrench. (By the way, this is not a frostproof setup).
If I walk into Home Depot and wake up one of the highly trained sales associates with a 2x4 to the shins, should I, in theory, be able to walk out with another valve assembly? Or, am I just as well off to try changing the washer or whatever's inside?
Also: There's a tiny knurled knob on the side of the valve. What's that?