We construct small-filter wells with cased flush drillings up to a diameter of 250 mm. The drilling depth can be varied depending on the soil material, as the casing can be extended as required below the 10.00 m drill mount height.
The small-filter wells can be equipped with rod pumps. Alternatively, they can be designed as relief wells with gravel/split columns.
Vacuum small-filter wells
Depending on soil conditions, vacuuming can be used to improve the performance of small-filter wells. In this case, the small-filter wells are sealed airtight with a specially designed cap after the normal construction has been completed. The special caps have passages for the power cable, the pump riser, and a vacuum inlet. Several vacuum small-filter wells can be operated at the same time with a single vacuum pump. The vacuum is controlled by a manometer for each individual vacuum small-filter well.
Important: normal small-filter wells cannot be vacuumed subsequently.
