Instructions in German and English was not quite exhaustive in the information. Connections of the pump well explained, however, for a gauge threaded plug must be removed under the "bonnet" (location not described). Recommendation from me: Posing on concrete slab (60x40 cm sufficient - Baumark ca 3,90 Euro), Teflon tape makes things safe - there was quite a bit of air between the hose and get Stutzen.Schlauchschellen - 2 were there! Construction total uncomplicated. Sand filter system was almost instantly close ... only at the inlet of the pump to filter screw must be tightened briefly.
Most images (helps build) can now be found at Amazon providers Anaterra - simple search on Amazon for "Wehncke sand filter system".