/diy/ - Do It Yourself

>replacing some faucets in an old ass apartment building
>shut off cold stop under lav sink, starts leaking from the packing nut
>ever so gently tighten packing with 426s, turns 1 degree and entire nipple breaks off in wall
>cold water gunning all over third floor apartment
>run downstairs, shut off main, clean up water, break out block wall, pull threads out of 90 with nipple extractor, replace, turn water back on
>tell myself I will be super careful with hot side stop
>begin to turn handle on hot side stop valve, nipple breaks off in wall, hot water starts gunning all over third floor apartment