The 310E 1.0 horse power water pump, made by DXD can be used to create those wonderfully relaxing jets of water in a whirlpool bath, spa or hot tub. This is a DXD 310 E pump which is used on hot tubs, pools and whirlpool baths. This is a suitable replacement for DXD model 310E pumps. The pump comes with two white union connectors (measurements below), which can be seen in product images. DXD 310 E Technical Information Diameter 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): 0.75 Power: 0.75 kW (or 180 watts) Volts: 230V / 50 Hz Protection Grade: IP 55 Maximum Lift (i.e. the maximum height the pump can pump water to): 10.0m Impeller Rotation Speed (RPM): 2850 Maximum Water Flow (Litres Per Minute): 300 Insulation Class: B Gross Weight: 8.0 kg Pump 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, and it quite common in Chinese spa manufacturers. We deliver the DXD 300 E pump worldwide.