Industrial-Grade Three-Phase Circulation for Large Water Features

The Aquascape Ext 18000 3-P is a three-phase external pond pump rated at 18,400 GPH (69,638 LPH) and 3,300 watts, designed for large commercial ponds, aquaculture operations, and high-volume professional water features with access to three-phase electrical supply. The three-phase motor provides superior efficiency and reduced heat generation compared to single-phase alternatives at this power level.

Maximum Volume Pumping for Professional Pond Applications

The Ext 18000 3-P is the highest-output model in the Aquascape Ext pump range. At 18,400 GPH (69,638 LPH) and a maximum head height of 13.7 m (45 ft), it handles the most demanding professional water feature and aquaculture recirculation requirements. Three-phase power reduces line current per phase compared to a single-phase equivalent, allowing operation on smaller gauge wiring over long distances to the switchgear, and provides the efficiency advantages of three-phase motor design for continuous duty applications.

How to Use

Install on a level pad adjacent to the water feature with adequate clearance for motor ventilation. Connect the 3-inch inlet to the pond through a full-port valve and strainer to protect the impeller. Connect the 2-inch discharge to the distribution plumbing. Connect the motor to the three-phase supply through a motor starter with correctly sized thermal overload protection. Prime the pump before first start-up. Service the mechanical seal annually and monitor the oil level in the seal chamber per the pump manual.

Ideal for large commercial koi ponds, public water features, aquaculture recirculation systems, and any professional installation requiring over 12,500 GPH (47,000 LPH) at three-phase power sites.