Quick view Jackel 18" Structural Foam Solid Septic Riser Cover (Green) Compare Ideal for access cover - Fits over 18" Corrugated Doublewall Pipe Alternate Product in stock 18G The SFRC18G, our septic tank riser cover, is constructed of injection molded polyethylene structural foam. Utilizing our Tech Tough™ design... Add to Wish List Add to My Wish List Create New Wish List