Having removed the old basin:There will be no need for an overflow connection if this is a basin fit, because it normally forms a part of the appliance as supplied. Normally the waste fitting is fixed into the basin with rubber washers, however it is possible to form a joint yourself by using the advice below:1). Make and press a circular lump of plumber’s mate or even silicone rubber to the underside section of the waste fitting that is going sit in the basin’s outlet. To guarantee that this joint will be a success make sure that the appliance is completely dry, if not these compounds will not work on porcelain. Archway Plumbers fit basin waste fittings.2). Put the waste fitting into the required position for securing and then apply a second ring of plumbers mate, silicon or maybe even a large rubber washer at the area around where the thread pokes through the waste hole on the appliance. 3). Fit a 32mm polythene washer. Screw a large back nut on the waste fitting. This will compress the whole lot together and make a good seal. To stop the waste fitting from turning in the basin as you are doing up the back nut, put two screwdrivers through the slots or grates in the waste fitting and you can hold it still. 4). Once the appliance is completed, there is another process to carry out known as the “second fix”, meaning you need to secure the appliance in position, and make sure it is adequately supported and is level. The top of the appliance is plugged in level as the gradient towards the waste is already in the design of the appliance. An Archway Plumber uses second fixes.NOTE:For the installation of plastic baths, there is a requirement for extra wall fixing clips, that come with the appliance. They are supplied with the fixing kit to stop the bath sagging, because it will carry extra weight with the volume of water as it fills up.