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Sinks are straightforward to replace. Simply remove the old sink and connect the new one. If a sink is being installed in a new position, you will need to reroute water supply and drainage pipes.
Before you start, turn off the water at the shut-off valves on the hot- and cold-water supply pipes. If there are no valves, part or all of each system may require draining down. With the water off, open the faucets and allow them to run dry.
Disconnect the supply tubes from the faucets, or on older systems, cut through rigid supply pipes. Unscrew the plastic nut connecting the trap to the waste pipe. When all the plumbing is disconnected, if there are screws holding the sink to the wall then remove them, then lift the sink away. There is no need to remove the faucets from the sink unless you want to reuse them. Undo the screws attaching the pedestal to the floor and remove it.
When you have removed the old sink, assess whether you need to reroute the plumbing. You may want to adjust the supply and drainage pipes slightly so that they run up inside the pedestal, rather than simply being hidden behind it. This isn’t essential, but you might decide it is worth doing if you have a side view of the sink. The supply pipes should have shut-off valves. Then follow the steps shown opposite to install a sink with a pedestal.
Assembling the components of the plug, trap, and faucets is similar for all types, but other aspects of the procedure can differ. For example, you might need to hide supply and drainage pipes in a wall. Units or countertops may need to be cut to house some types of sinks — the manufacturer will generally supply a cutting template. If you are putting a sink into a stone countertop, it may need to be cut at the factory.
Wall-mounted sinks rely on their brackets to support their full weight. Most manufacturers supply special brackets with wall-mounted sinks. If none are supplied, seek installation advice from your supplier. When attaching a wall-mounted sink to a stud wall, you will need to insert new blocking to provide firm attachment points. You can modify the plumbing to run through the wall at the same time. If you want to hide the supply and drainage pipes of a wall-mounted sink in a solid wall, you will have to chisel out grooves for them to sit in. Run the pipes through protective casings, then finish the wall over the top. This technique is known as "chasing."
Measure the fastener positions on the sink and mark them to the wall (Image 1). Make sure the two points are level and the supply and waste pipes are centered. Drill pilot holes at the marked off points.
Screw the brackets provided into the pilot holes (Image 2). If you are attaching to a masonry wall, insert wall plugs into the pilot holes first.
Hang the sink on the brackets, then tighten the nuts to hold the sink firmly (Image 3). Connect the hot and cold water, and the waste pipe.
Excerpted from Do It Yourself Home Improvement
© Dorling Kindersley Limited 2009