Do I need to service my BWW Petite Portable Single Electric Breast Pump?

No. This pump is a sealed unit and there are no parts that need servicing. If you look after the actual pump unit carefully and make sure it doesn't get exposed to liquids like water, you should not experience any problems with the pump

With regards to the bottles and flanges, BabyWombWorld does stock the main parts in case you need to replace them over time