✅Turn off the water supply and drain any remaining water from the pipes. ✅Remove the old basin if replacing it, by disconnecting the plumbing and unscrewing the fixings. ✅Position the new basin, mark fixing points, and ensure it is level. ✅Install taps onto the basin and connect flexible water supply pipes. ✅Fit the waste and trap assembly, sealing joints with silicone to prevent leaks. ✅Secure the basin to the wall or countertop using appropriate fixings and wall plugs. ✅Connect the hot and cold water supply lines to the taps. ✅Turn the water supply back on and check for leaks in all connections. ✅Apply silicone sealant around the basin edges for a watertight finish.