Aluminum and stainless steel tanks for septic trucks from Mid-State Tank/Arthur Custom Tank are available with capacities up to 5,500 gallons. Tanks come standard with 20-inch top and rear manways, primary, three 5-inch sight eyes, pressure relief valve, 4-inch inlet, 6-inch discharge, full hose trays, hose support at rear, ladder to the top manhole, LED lights and wiring, work lights at the rear, full mounting kit and heavy-duty rear bumper. They are DOT registered and ISO 9001-2008 QMS registered. 800/722-8384; www.midstatetank.com.