The GapVax HV55 HydroVax wet/dry unit is constructed of 1/4-inch ASTM A572 Grade 50 steel, and has a 12 1/2-cubic-yard debris body and water tank options ranging from 400 to 1,400 gallons. It includes a positive displacement vacuum pump rated at 5,250 cfm with 28 inches Hg. The 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 dual cylinders, with four fail-safe, individually adjustable locks that ensure a complete seal. Options include a cold weather recirculation package, sludge pump, auger unloading system, body pressurization system, remote pendants and wireless remotes, high rail package and stainless steel body. 888/442-7829; www.gapvax.com.