When evaluating a Beiben water tank truck, you must prioritize the chassis durability and tank material. Beiben trucks utilize Mercedes-Benz technology, so ensure the chassis is a genuine NG80 or V3 series for heavy-duty performance. The tank should be constructed from Q235 carbon steel or 304 stainless steel with a thickness of at least 4-5mm to prevent corrosion and structural fatigue. Additionally, verify the pump capacity, typically ranging from 40 to 60 m³/h, to ensure efficient water discharge for dust suppression or landscaping.