Icon holding tanks are thermoformed of high impact ABS plastic. All seams are solvent welded and have a 1-1/4" mounting flange around the perimeter for easy installation. The HT704ED Holding Tank from Icon features a left end drain and a 32 gallon holding capacity. The dimensions of this tank are 54.25" x 27.5" x 9". Comes with 3" spigot fittings and four level sensors installed on the tank.