ANGLE STOP VALVE 1/2 INCH X 3/8 INCH FOR DUMMIES

This a single broke at three:00 AM over a Friday night at my nephews dwelling. Two of them, and after that I noticed a third one which had been modified out now.That will are already a bitch if that nipple broke off within the wall. Do you alert the HO about that chance (the extra repair cost) - or simply decide to try to eat the cost if it occurs?