Performed maintenance service on Zoeller M63 sump pump system in Loganville basement. Pump is approximately 3 years old and showing good operation. Cleaned debris from basin and checked float valve operation. Inspected check valve and discharge line - both in excellent condition. Verified proper electrical connections and tested GFCI protection. System cycling appropriately with no unusual noises. Recommended customer continue annual maintenance schedule to maximize lifespan of unit.