The M49 fuel tanker and M50 water tanker variants were initially based on the M44 chassis. The M49C series, however, were vehicles converted from C series drop-side cargo variants. M49's have 1200-gallon tanks. Early models had triple compartments (200g front, 400g mid, baffled 600g rear),but most models have two 600-gallon baffled tanks. The M50 had a 1,000-U.S.-gallon (3,800 L; 830 imp gal) water tank, of which later variants had internal baffles to combat weight transfer during motion. In some areas the M35 is still used today as a wildland firefighting truck with a portable water supply and fully operational pump.