The ICON H4529 23-Gallon Holding Tank is designed for RVs, Fifth Wheels, Travel Trailers, and Campers. Increase your waste tank capacity or replace your leaky waste tank with a durable, impact-resistant ICON Tank. Features one-piece roto-molded construction.• Roto-molded, one-piece construction with spin-welded components• Certified to IAPMO standards• Center end drain• One 3" hub fitting• Four 1" OD spin weld sensor probes• Capacity: 23 Gallons• 56" x 16-1/4" x 8-1/2" Durable, impact-resistant, one-piece roto-molded construction Certified to IAPMO standards Center end drain | Icon Technologies ICON H4529 Holding Tank, 23 Gal