This is a DXD 310 H pump which is used on hot tubs, pools and whirlpool baths. This is a suitable replacement for DXD model 310H pumps.Please note that even though the colour of the pump in this photo is blue the pump can come in different colours but this does not change any functionality of the pump. A change in colour is purely aesthetic. As long as the sticker on the pump says it is a DXD 310 H then this will be a like for like replacement.The pump comes with two white union connectors (measurements below), which can be seen in product images.DXD 310 H 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): 1.0Power: 0.75 kW (or 180 watts)Volts: 230V / 50 HzProtection Grade: IP 55Maximum Lift (i.e. the maximum height the pump can pump water to): 6.0mImpeller Rotation Speed (RPM): 2850Maximum Water Flow (Litres Per Minute): 292Insulation Class: BGross Weight: 6.8 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 300 H pump worldwide.