Polylok 24" x 12" Septic Tank Riser

Key Features and Benefits

• Tall 12" Profile — Provides substantial height per unit, reducing the number of sections needed for deeper tank lids while maintaining stackability for fine adjustments.
• Stackable System — Easily interlocks with other Polylok 24" risers (6", 2", etc.) or adapter rings; build exact heights without cutting or custom fabrication.
• Secure Locking — Snaps/locks together and secures with included stainless steel screws (use alternating pattern for even fastening) for a stable, reliable connection.
• Watertight and Airtight Capability — Enables effective vacuum or water testing of the septic tank; apply butyl sealant tape (recommended, as factory gaskets are no longer standard on newer units) between sections for optimal sealing against groundwater infiltration.
• Reinforced Strength — Features internal structural ribs and reinforcements for added rigidity; supports pedestrian traffic and light loads like lawn mowers or small garden tractors when properly installed and backfilled.
• Premium UV Protection — Highest UV-ray resistance on the market to prevent fading, brittleness, or cracking from long-term sun exposure.
• Frost-Resistant Design — Includes tear-off rings (where applicable) to help prevent frost adhesion in cold climates.
• Lightweight & User-Friendly — Significantly easier to transport, handle, and install than heavy concrete risers, saving time and labor.
• Made in the USA — Patented Polylok design from a trusted leader in septic and onsite wastewater products.

Specifications

• Diameter: 24 inches (inside diameter)
• Height: 12 inches
• Material: High-density polyethylene (HDPE)
• Color: Green
• Compatibility: Works exclusively with Polylok 24" series risers and adapter rings (#3009-AR square tank adapter or #3009-RTR24 round tank adapter). Not interchangeable with other brands without adapters. Note: Some variants feature wall flats (may not accept Polylok safety screens—confirm model if needed).
• Included: Riser section + stainless steel attachment screws

Important Note: Polylok risers no longer include factory-installed gaskets as standard—use butyl sealant rope/tape (ASTM-C990 compliant) between joints for a dependable watertight seal.

Easy Installation

1. Attach base to a compatible Polylok adapter ring secured to the septic tank lid.
2. Stack and align the 12" riser (or combine with 6"/2" sections) to match your required height from tank to finished grade.
3. Fasten each connection securely with provided stainless steel screws.
4. Apply butyl sealant tape between all mating surfaces for airtight/watertight performance.
5. Top with a Polylok 24" riser lid (sold separately) and backfill carefully for stability.

Perfect for new installations, retrofits, or upgrading buried tank access—eliminate digging hassles during pumping, inspections, or maintenance!

Polylok 24" x 12" Septic Tank Riser Videos

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Polylok Septic Tank Risers

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Polylok 24" x 12" Septic Tank Riser Downloadable Documents