GMP Electric Surface Trash Self Priming Pumps

The GMP Electric Surface Trash Self-Priming Pumps are a range of heavy-duty cast iron surface-mounted pumps designed for clean and dirty wastewater, construction site drainage, and applications where the liquid contains soft solids and debris. Unlike the standard HGM dirty water range, all models here are fully trash duty: they are fitted with an inspection door on the suction body for rapid blockage clearance, and a wear disc on the shaft for added durability. Construction is cast iron throughout, with a stainless steel shaft and silicon carbide mechanical seal. All models are self-priming to 6 metres.

The range covers 1½-inch, 2-inch, and 3-inch port sizes, in both single-phase 230V and three-phase 400V configurations, with flow rates from 280 l/min up to 1,400 l/min. The largest model, the B3XRA-ST EANH, is supplied on a skid plate (as are all models rated 4kW and above) for stable installation on uneven ground. Maximum liquid temperature is 60°C. These pumps are not suitable for abrasive materials.

Choosing the Right Model

Model codes in this range follow a consistent pattern. The number before the K indicates port size: B1½KQA-ST = 1½-inch, B2KQA-ST = 2-inch, B3KQA-ST = 3-inch. The suffix code identifies the specific model variant; the final digit in the suffix is typically 3 or 5 for single-phase (230V) and 4 or 6 for three-phase (400V). The large high-head model, EANH, is three-phase only.

The 1½-inch EA6E/EA6F models are suitable for lighter duty drainage where flow volume is modest. The 2-inch EAR3/EAR4 models are the most commonly used for general site dewatering and wastewater transfer. The 3-inch EAR5/EAR6 models handle higher flow volumes and pass solids up to 27mm. The EANH is a high-head, high-capacity model producing 1,400 l/min at 26m head, suited to pumping over greater distances or heights.

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