When fitting the new taps or mixer, unscrew the back-nuts, press some plumber’s putt round the tail directly below the tap body a fit a plastic washer onto the top.
Push the tails through the holes in the base. Slip flat plastic washers over the tails where they protrude from beneath the basin. screw on the back-nuts and tighten them up. Make sure that the taps or mixer are secure, but don’t overtighten them. To make tightening easier, (and undoing, if ever necessary) use top-hat washers.
All that remains to be done is to conned the swivel tap connectors to the tails of the new taps or mixer. You will see that a tap connector consists of a lining — with a flange — that is inserted into the tap tail and is then secured by the coupling nut. This nut provided with a washer to ensure a watertight connection. When renewing taps you may well need to renew this small washer.
It is possible that when you come to connect the water supply pipes to the taps you will get an unpleasant surprise. The tails of modern taps are slightly shorter than those of older ones and the tap connectors may not reach. If the water supply pipes are of lead or of copper it is quite likely that they will have enough ‘give’ to enable you to make the connection but, if not, there are extension pieces specially made to bridge the gap.
If you’re replacing existing bib taps with those of a more modern design. it’s a relatively simple matter of disconnecting and unscrewing the old ones and fitting the new taps in their place. However, it’s quite possible that you’ll want to remove the bib taps altogether and fit a new sink with some pillar taps. This will involve a little more plumbing work. To start with, turn off the water supply and remove the taps and old sink.
If the pipework comes up from the floor, you’ll need to uncover the run in the wall to below where the new sink will go. You should then be able to ease the pipes away from the wall and cut off the exposed sections. This will allow you to join short lengths of new pipe, bent slightly “if necessary, to link the pipe ends and the tap tails.
Alternatively. if the pipes come down the wall you’ll have to extend the run to be,row the level of the new sink and use elbow fittings to link the pipe to the tap tails. In either case it’s a good idea to fit the taps to the new sink first and to make up the pipe- work runs slightly overlong, so that when the new sink is offered up to the wall you can measure up accurately and avoid the risk of. cutting off too much pipe.
Rather than having to make difficult bends you can use lengths of corrugated copper pipe. One end of the pipe is plain so that it can be fitted to the 15mm supply pipes with either a soldered capillary or compression fitting: the other end has a swivel tap connector.