Register needing replacement is return grill 16x 30. On today’s call we have water leaking on all 4 corners of the return grille. No water is detected inside the ducting. There is no attic access. This is our second time out here for the same issue. Both service calls have been complementary at no additional charge. The elbow was resealed with tar on all 4 sides. Some damage to drywall and paint. This call will be passed on to the office for follow up.