Calamity shank

An calamity shank is placed in the filter bed of a swimming pond, which is provided with a free space under the filter bed. Dirt is thus effectively removed

Shank for sucking up sediment. When a swimming pond is built up according to the ‘upflow’ principle, the dirt settles in the hollow space under the swamp bed. It can be sucked away here once or twice a year via the drain collector in which you place a submersible pump. Lid can be ordered separately.