The 4,000-gallon aluminum Matador code or noncode septic/grease vacuum tank from Amthor International comes standard with a 5/16-inch-thick side shell and floor, full-head baffles and no external rings. It is available as a dumping tank with or without full-opening rear doors, as well as with off-road construction options for various applications. Various pump models are available with a choice of numerous stock tanks and chassis. 800-328-6633; www.amthorinternational.com.