Dispatched to add refrigerant that another company installed. At arrival I tested the AC system and my pressures indicated that it was super low refrigerant. After performing a recovery and a leak test, I discovered the leak at the bolt for the orifice. Tightened the orifices bolt down and confirmed there was no leak. After the leak test, I pulled a vacuum and charge the system with 5.1lbs. Tested the system and is performing at manufacture specs. Thank you for choosing LBA services.