1). Stand the new bath in position and adjust the feet to the required height. Make sure the bath is level. Mark the wall to show the position of the taps and the new waste outlet. Remove the bath. This work can be undertaken by Clapham Plumbers .2). Lengthen and run the waste and supply pipes to the vicinity of the taps and waste outlet. These should terminate in a position which will still allow you to re-fit the bath, but also afford you access to making the permanent connections. This will prevent the need for you to squeeze your hand between the bath and wall and fiddle with awkward connections.3). Put together and fit the waste outlet for the bath. Follow the manufacturer’s instructions regarding the position of gaskets and/or use of sealant. Assemble the overflow pipe. The systems for these vary, but they generally connect back down to the main waste point.4). Fit and fix the taps once more following the manufacturers instructions. If the taps have tail pipes with them, shape and fit these. Move the bath into position and check all pipework alignment before securing using the recommended fixings.Connecting the hot & cold.5). Connect the extensions which you fitted earlier to the supply pipes. It is generally best to use compression fittings to do this. Connect the trap to the waste outlet and to the waste pipe. Where space beneath the bath is tight, a shallower trap should be used. But, in this case, the waste must go to a gulley not to a soil stack. Before fitting a side panel to the bath, switch on the water supply and check all work for leaks. This should include the waste. It is a lot easier to discover a leak now on the overflow rather than relying on a wet ceiling below to tell you. If you are not confident, then call a professional like a Clapham Plumber .