A Style Water Tank An A style tank features a 36" x 42" x 12" refilling lid. A style tanks feature extra baffles, 4 point leaf spring hold down kit, full length built-in fenders, 4 full size bolsters, front and rear, and are ASME certified. Standard tank sizes available: 2000, 2500, 3600, & 4000 gallons. Built up to 6400 gallons.