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The POLYLOK 3009-NG Riser is a 20-inch round component designed for septic systems, combining features of concrete and plastic risers. This HDPE riser maintains its shape, is stackable, and screws together to form a watertight and airtight seal. Its structural ribs prevent frost adhesion, making it suitable for frost-prone areas and ensuring easy septic access to grade.
Durable HDPE septic riser offering watertight sealing, frost protection, and easy access.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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