The Zoeller Pump Company Riser Assembly for Septic Tanks, 18" Dia X 4' Lg is designed for optimal access and maintenance of septic systems. With an 18" diameter and a length of 4 feet, this riser provides easy access for inspections and servicing. Made from high-quality materials, it offers durability and resistance to harsh environmental conditions. This riser assembly is compatible with standard septic tank openings, ensuring a secure fit. Improve the accessibility of your septic system with this robust and reliable riser assembly.