The Little Giant 513121 BB1830CS3V3D is a basin and cover assembly for Simplex Systems. It does not include the pump. With an appropriate pump installed, it is used for the collection and transfer of sewage, effluent, drainage or seepage water. It has a discharge size of 3” (76 mm). This Little Giant 513121 BB1830CS3V3D Basin and Cover Assembly measures 18” x 30”. It consists of a one-piece, seam-free polyethylene structural foam basin and a two-piece steel cover. It includes bolt-on flanges and a 4” cast iron hub. Its vent is 3” in diameter. For more details, you can refer to the specification sheet. The Little Giant 513121 BB1830CS3V3D Basin and Cover Assembly is covered by a limited warranty for a period of 24 months. Little Giant has proven their excellence for over 70 years by producing reliable pump solutions, packaged system options, and accessories.