This is the DXD 310A water pump which is used in hot tubs, whirlpool baths and spas. The pump is used on a large number of different brands. To identify your pump and to determine whether the DXD 310A is the pump that you need, you will need to access your existing pump and read the model number on the sticker which is on the top of the pump.The pump comes with two white union connectors (measurements below), which can be seen in product images.The model number should read DXD 310A. If you need a different DXD 310 pump, for example the DXD 310B,310X and 310H, please search in the box above, browse our DXD water pump category or click on a related product below. If you are unsure what pump you need or if you have a pump which you can't find on our site, please contact us and we will do all we can to help you.The DXD range of pumps are not just used in Chinese manufactures of hot tubs and whirlpool baths but are used by manufacturers internationally. This DXD 310 A water circulation pump is used on the following brands and models (however is not restricted to just these): - Avondale - Antonio - PembrookTechnical InformationFor comprehensive technical information on the pump please take a look at the technical infomation image. Key information for this pump can be found below: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): 1.0Power: 0.75 kW (or 750 watts)Volts: 230V / 50 HzProtection Grade: IP 55Maximum Lift (i.e. the maximum height the pump can pump water to): 8.0mGross Weight: 6.8 kgPump Union Connector: 2 1/2" inch to 2" inch connector (click here to see further information on this pump union)