Slide-in units from Best Enterprises are built with 304 stainless steel in various sizes, whether it may be waste or water compartments. Stock units are 300-gallon wastewater and 150-gallon freshwater, or 400-gallon wastewater and 200-gallon freshwater, with custom sizes also available. All fittings that are connected to the tank are 304 stainless steel, and vacuum pumps are driven by a Honda gasoline motor with Conde, Masport or customer-specified vacuum pumps. All units have a sump dump built in the bottom of the tank with a 10-foot dump hose. Units have a Hypro water pump with 50 feet of washdown hose. 800/288-2378; www.bestenterprises.net.