Installing new double bowl bathroom sinks is an enjoyable project which can be completed in around half a day. As long as you prepare fully you really shouldn't have a problem completing this project very quickly.
Step 1 - Being Safe
Whenever working on the plumbing in your house you should turn off the water. If you have an existing sink in your home then you can turn off the shut off valves below the sink. However, if you are fitting a new sink then you will need to shut off the water to your whole house.
Once the water is shut off open the faucet to drain the water out of the system. Don't start work until the water has stopped running.
Step 2 - Removing the Old Sink
Once the water has been switched off you can start removing the old faucets and sink. Do this carefully because you could cause damage to your walls if you're not careful. If you're fitting a new sink then you will need to cut into the water pipes in your home so that you can connect the new sink.
Step 3 - Unpacking
When you're ready you then need to unpack both of the new sinks and check that everything is in the box which should be. If anything is missing then you will need to get a replacement. Also check that the sinks are not damaged. Checking now before fitting can save a lot of hassle.
Most sinks have a paper template inside which can be used to help drill the holes in the vanity. If you don't already have one of these then you will need to make your own.
Step 4 - Cutting the Counter-top
When fitting a double basin sink you will need to cut two holes in your counter-top. Most sinks come with paper templates to make cutting the holes easy. Place the templates on top of the counter-top and drill a hole at regular intervals around the outline of both of the sinks. Then using a saber saw to cut out the middle of the counter top. Once you have finished cutting out the middle, remove the piece and check that it's the right size for the sink. If the hole is too small then use a file or a saw to make the hole bigger. If the hole is too big then you will need to be creative. Then repeat the process again to cut out the second hole.
Place the sink into the hole you've just cut and ensure that it fits snugly. Then fit the second sink in the same vanity unit.
Step 5 - Connecting the Plumbing
Once the sinks are in place you can then connect the cold and hot water pipes to the right faucets. If you didn't already have a shut off valve fitted then you could install one now. Use plumbers tape to seal the threads of the fittings.
Step 6 - Testing
Now turn the water back on and check for any leaks from either sink, also check that all of the faucets work and that the water flows out properly.
Step 7 - Finishing Touches
Use a caulking gun to run a thin bead of caulk down the gap in between both of the sinks and the counter top. This will prevent moisture from getting between the counter top and the sink.