I have to try to fix a leak in the main indoor shutoff valve at my daughter's house that I have to close to work on the shower valve in the upstairs bath. It's fine wide open but drips from the packing when closed. I know how to add some packing. Since it's a condo, they used cheap fittings and I'm concerned that if the valve fails when I turn it off to repack it, I'll have a disaster. The pic appears to be the main shutoff for the unit. Right to turn off? Anything else to know? Help!
