Pump housing in plastic design

The pump housing in plastic construction, said housing via a first casing (1) has a side facing the conveying medium first side, wherein the housing via a second casing (2) has, facing with one of the surrounding second side, characterized in that the first and the second envelope (1, 2) are each configured and dimensionally stable, there is a distance between the first shell and the second shell, wherein the distance between the first and the second shell (1, 2) is provided with a filler material (3).