Hi …. You would need to drill the hole on the side of the AQUAbox to 12mm from 10mm… I would suggest using a step drill not a standard drill or you may tear the hole…. you’ll need a 9mm top hat grommet, an AQUAvalve5 and 9mm pipe…. also depending on the connection to the reservoir you will also need to drill the tanks per the AQUAbox or upgrade the filter from 16mm-6mm to 16mm-9mm…. it really depends on how your pipe is connected to the reservoir.If you are still not sure please call the office and they will guide you through exactly what you require