3-12-2025: Cleaned duct work from registers in living room (x2)and dining room (x1) to remove all pea gravel back fill and dust from duct work, installed 8”x6” tee liner from middle register in living room positioning at tee connection for register in dining room covering over hole at tee cut out where backfill was falling into duct work. Encapsulated duct work with duct armor from middle register in living room up to 90 elbow near tee liner installed also from register in dining room up to main where tee liner was installed. ***after cleaning pea gravel at tee where tee liner was being installed noticed 90 elbow 1’ from tee was rusted and weak with pea gravel entering duct work, we encapsulated 90 elbow with duct armor to try and stop pea gravel dust from entering line, may need mortar or install patch liner on elbow in future (at an additional cost) if dust continues to enter duct work.