Arrived at location on 7/12/22 - Checked over unit, found nothing visibly wrong, put bags in and ran, unit pulled vacuum and sealed normally, repeated 2 more times. Spoke with kitchen manager, said that it seals but bags aren’t keeping vacuum. Put a wrench in bag and sealed on left side, let sit, both are holding, checked original bags and found some had lost vacuum. On closer inspection of bag it appears that they may have small punctures. Looked at unsealed bags and found a few more like that. Recommend keeping new bags in an area where they won’t be damaged.