Shop for Plumbing at The Home Depot. The Mustee, E. L. & Sons, Inc. Utilatub 24 in. x 20 in. Structural Thermoplastic Floor-Mount Utility Tub in White features molded, structural thermoplastic construction for long-lasting use, and this smooth surface resists rust for easy cleaning to help keep your basin looking new. This large, 18-gallon capacity, floor-mount tub comes with heavy-gauge steel legs that include levelers for uneven floors to help make your tub stable for your convenience.