The Zoeller Pump Company Riser Assembly for Septic Tanks measures 18" in diameter and 5' in length, designed for effective septic system access. Constructed from high-quality materials, this riser assembly is built to withstand the rigors of outdoor environments. Its size allows for easy installation and maintenance of septic systems, ensuring compliance with local regulations. The riser is compatible with various septic tank models, making it a versatile choice for residential and commercial applications. It meets industry standards for durability and safety.