Important Info
Please use the riser sizer below for any sizing questions you may have. This calculator should answer any and all questions.The 20" x 11" septic tank riser kit raises your septic system access point closer to ground level, making inspections, pumping, and maintenance more convenient. This shorter riser height is ideal for systems that require only a small lift to improve accessibility.
This kit includes a 20" diameter riser, a secure cover, and all necessary installation hardware. Each component is made from heavy-duty, UV-resistant polyethylene, designed to withstand long-term outdoor exposure, moisture, and soil contact without rusting or corroding. The fitted cover helps protect against water intrusion and limits unauthorized access.
Key Features:
Installation Notes:
This riser kit can be installed on both new and existing septic systems. Before ordering, confirm your tank opening size and the riser height needed for your setup. Professional installation is recommended to ensure proper sealing, compliance with local codes, and long-term reliability.
Routine inspections of the riser and cover will help maintain performance and prevent water intrusion.
Note: Dimensions shown are for the kit base. This model includes a 3" safety pan with an inner diameter of 20" due to a slight bevel. Dome lids add approximately 1" to overall height. Upgrades to flat lids are available for an additional cost. Remove any existing concrete lid before installation. Please confirm diameter and height before ordering. Return shipping costs for incorrectly ordered sizes are the customer’s responsibility.
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