With the HC551/30, we present you a diesel vacuum unit, which is ideal for groundwater lowering for large volumes. The compact design, the use of a waste water discharge pump, the extraordinary vacuum performance of a so-called dry runner and the relatively low fuel consumption are the main features of the new 6 "pump. A powerful 3-cylinder Hatz engine powers the unit. The diesel engine is considered very durable. In practice, immersion depths of up to 8 meters are conceivable, making the HC551/30 qualified for countless applications. One very important feature of all of our pumps is the ability to efficiently separate the air/water mixture. This successful concept was also implemented in the new HC551/30.