The Tuf-Tite 24" Riser-to-Riser (RTR) Adapter is a component used for converting existing risers or pipes (such as corrugated pipe lips or other manufacturer's risers) to fit Tuf-Tite 24" risers and lids. This provides a versatile solution for retrofitting septic systems with standard Tuf-Tite components. Features:System Conversion: Allows any other manufacturer's tanks, risers, or corrugated pipe to be converted for use with Tuf-Tite 24" risers and lids.Material: Made from heavy-duty high-density polyethylene (HDPE), which is UV-resistant and designed for long-term underground use without corroding.Watertight Connection: Provides a reliable, secure connection point, which forms a watertight seal when installed with recommended butyl sealant and stainless steel screws.Versatile Mounting: Can be mounted on various flat surfaces, including plastic, fiberglass, or concrete risers, and flat-rimmed corrugated pipe.Ease of Use: Simply secured with screws and butyl sealant to the existing structure, then any 24" Tuf-Tite riser can be attached