Topp - Fiberglass Extensions

Extension Details: Manufactured to your dimensions. 18" through 120" inside diameters. All lengths available, depends upon the current depth of your wet well. Consult our factory directly to determine your correct installation size. Sealing kit available to seal the basin and extension gasket material and hardware. Uses the same manufacturing process as our fiberglass basins. Extensions available in 18”, 24”, 30”, 36”, 42”, 48”, 60”, 72”, 96" and 120".