This is a DXD 320 ES pump which is used on hot tubs, pools and whirlpool baths. This is a suitable replacement for DXD model 320ES pumps. This is a 2 speed pump which means that it has two settings, 2.0HP and a less powerful 0.5HP.The pump comes with two white union connectors (measurements below), which can be seen in product images.DXD 320 ES Technical InformationDiameter of the Female Pump Union Connector That Connects to the Water Pump: 55.5mm / 2.185" inches (2 and 3/16" inches)Diameter of the Two Threaded Connectors on the Pump: 62.5mm / 2.46" inches (2 and 29/64" inches)Horse Power (HP): 2.0 HP and 0.5 HPPower: 1.5 kW (or 1500 watts)Volts: 230V / 50 HzProtection Grade: IP 55Maximum Lift (i.e. the maximum height the pump can pump water to): 19.0m (for the 2.0HP Setting), 3.0m (for the 0.5HP setting)Impeller Rotation Speed (RPM): 2850 (for the 2.0HP Setting), 1450 (for the 0.5HP setting)Maximum Water Flow (Litres Per Minute): 733 for the 2.0HP Setting), 317 (for the 0.5HP setting)Insulation Class: BGross Weight: 20.0 kgPump Union Connector: 2 1/2" inch to 2" inch connector (click here to see further information on this pump union)Can be used in a swimming pool as well as a spa.We deliver the DXD 320 ES pump worldwide.