When procuring a Howo water tank truck, you must prioritize the chassis model (e.g., Howo 7 or Howo N series) and the engine horsepower (typically ranging from 260HP to 400HP) to ensure it can handle the intended terrain. The tank material is critical; for standard water transport, Q235 carbon steel is common, but for potable water, 304 stainless steel with food-grade epoxy coating is mandatory. Additionally, verify the pump capacity, usually requiring a flow rate of 60-90 m³/h to ensure efficient suction and discharge performance.