The Standard Flow System is the most popular inertial pump. This system is best suited for 2" monitoring wells and can provide lifts of 150 to 200 feet. Flow rates can be 0 - 6 L/min. The D25 offers the ability to develop new monitoring well installations and can remove even the most turbid groundwater with no detrimental effect to the pump. Once development is completed the same pump can be used to both purge and sample the well.