Units equipped with a pressure/suction pump (e.g. circulators of the HighTech series) are equipped with two pumps that complement one another. While the pressure pump pumps the fluid from the internal bath tank into the external system, the second pump sucks the fluid through a return line into the bath. Each pump has its own capacity. Therefore, there are two separate values for the pressure and suction capacities stated in the technical specifications.Advantage: an especially high flow rate. , Units equipped with a pressure/suction pump (e.g. circulators of the HighTech series) are equipped with two pumps that complement one another. While the pressure pump pumps the fluid from the internal bath tank into the external system, the second pump sucks the fluid through a return line into the bath. Each pump has its own capacity. Therefore, there are two separate values for the pressure and suction capacities stated in the technical specifications.Advantage: an especially high flow rate.