Technician arrived to inspect problem with p-trap. Client stated p-trap had been leaking for the last couple of months. Technician inspected and found p-trap nut to be slightly loose. Technician unscrewed applied pipe dope and then tightened down. Due to nature of call and time to complete technician did not charge for service. Cl ient was so pleased that he requested we come out for a possible HVAC replacement. Technician got on the phone with the office to schedule that. Technician pulled off