1,000 Gallon Septic Tank Dimensions: Concrete and Plastic Sizes
Updated October 2026. Dimensions from manufacturer spec sheets (Oldcastle, Jensen Precast, Norwesco); models vary, so check the exact tank. A 1,000 gallon septic tank is usually about 8 feet long, 4 to 5.5 feet wide and 5 to 6 feet tall if it is concrete. Plastic 1,000 gallon tanks are longer and lower: Norwesco’s model … Read more