The square drain-filter, measuring 11.5 x 22.5 cm, fits into flood table inlays with adequate drain-hutch. Drain-filters are very important, because if they are missing, the draining water carries small plant pieces and bigger pieces of dirt with it, and that way block the hoses. These filters hold back the particles, the hoses and connectors stay clear.
The filter contains three pre-cut round holes with a diameter of 4 cm for the inflow and outflow of the flood tables. By crushing these pre-cuts you open the holes for the hose ends. On top of these hose ends you mount the prefilters.
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