125mm Submersible Sewage Pumps with GAK-125 Coupling

Both models here move the same 130 m³/h; the choice comes down to how much lift your site needs.

At this size, auto-coupling installation isn’t really a discussion point — the civil-work savings against a dry pump-house are large enough that almost every project defaults to GAK-125 rails from the start. One detail that gets missed at order time: guide-rail length is priced against your actual pit depth, not a standard catalogue length, so confirm that dimension before placing the order. For the 15kW QW variant specifically, on emerging-market tender sites, a quick check on local supply-voltage stability makes sense too, since the running current is substantial enough to expose weak grid connections.