The oil pump is easy to use, overcoming traditional refuel shortcoming of easily mixing air. During refueling process, there is no need to drop the system's refrigerant, saving costs and simplifying the working procedure. It is mainly suitable for York, Carrier, Trane and Macquay systems etc. Application of Oil Pump Central Air Conditioning Payment T/T Delivery 7 days Origin China Minimum Order 1 Packaging Carton Inspection 1-year guarrantee Samples Charge Remarks 1-year guarrantee and forever technic support