Gardena and the plastic thread

The pump is suitable, in my view at most for rain barrel and sprinklers. If you want to screw on the super soft plastic thread of Gardena pump something else, as loose plastic clutter, then you quickly realize that this terrible plastic threads up quickly stretch the hooves of metal. Each cheap house waterworks from the hardware store has a metal thread. Gardena rides but mercilessly around on the plastic threads.
For fixed installation, therefore for me unusable.