Septic tank pumping typically takes 30 to 60 minutes depending on tank size accessibility and sludge buildup. A standard 1000-gallon tank pumps in about 30 minutes. Larger tanks or those with heavy buildup take longer. The technician will locate the lid dig if necessary and pump all solids and liquids. Schedule pumping during dry weather for easier ground access. Most companies recommend morning appointments for the best scheduling flexibility and fewer delays.