Standard slide-in units from Pik Rite are available in 300- and 450-gallon sizes, with custom sizing available. Units are also available in a variety of materials, such as steel, stainless steel and aluminum, with optional freshwater or non-freshwater compartments. The freshwater compartment includes a 12-volt washdown pump, while the non-freshwater compartment is designed with dome heads for added strength. The tank-within-a-tank design provides even weight distribution, which doesn’t overload the axle and creates a safer environment. Various vacuum pump and engine options are available. They have all-steel components, a 3-inch discharge with poly-ball valve, 30 feet of 2-inch hose with poly-ball valve and PVC nozzle. 800/326-9763; www.pikrite.com.