How to Plumb in a New Bath
Friday, March 12th, 2010Installing a new bath can be fiddly and awkward work, but if you’re relatively confident in your DIY abilities, it’s hardly rocket science. As a new bathroom can add 10% to the value of your home, it’s an essential part of any property development project.
Put the new bath into position, it’s always easier to put it where the old bath was, but it isn’t that hard to extend drainage and pipe runs. Adjust the feet and ensure the bath is level. Mark the location of the new taps and the waste outlet on the wall and remove the bath.
The trickiest part, technically, is extending the water pipes. If you’re confident, solder copper fittings like ‘end feed’ straight unions, right-angled elbows and tab connectors, so that the pipe rises to the taps. You’ll need emery cloth, solder, flux, heat-retardant mat and a blowtorch to solder the fittings. You can always cheat and use compression fittings to extend the copper, but it’s not best practice. Add service valves to each pipe near the tap. Remember to think of access; the waste and water pipes should terminate in a position that isn’t too fiddly to work on.
Next ‘dress’ the bath, which is to say add the taps and waste outlet and assemble the overflow pipe. Re-position the bath and connect up the taps to the pipes and the trap to the waste drainage. Turn on the water supply and check for leaks before fitting the side panel. Finally, finish off any remaining painting, decorating and plastering and enjoy your new bathroom.