The HV56 from GapVax has a 15-cubic-yard debris body and water tank options ranging from 350 to 1,200 gallons. Its PD vacuum pump is rated at 3,500 cfm and 28 inches Hg. Its filter design prolongs the life of the filter bags and eliminates the threat of material entering the vacuum pump. The tailgate is fully opening with a field-adjustable hinge and four fail-safe, individually adjustable locks ensuring a complete seal. Options include a cold-weather package, sludge pump, auger system, body pressurization system, wireless remotes, high rail package, washdown system and stainless steel body. 888/442-7829; www.gapvax.com.