One of the easiest ways to update your bathroom is to replace your existing toilet and sink with updated fixtures. You can accomplish this without much difficulty. The old sink and cabinet brackets are typically held in place by either 1" pipe-joint or threaded pipe (check installation instructions below). Use of longer pipe doesn't provide a stable solution since the fittings can loosen over time. Here are simple steps for replacing your existing sink and cabinet with updated fixtures:
If your new sink is a different shape than your old one, you will have to measure your new sink. Write down the measurements, including the height and width. You should have a piece of plywood or another flat surface on which to work. This surface can serve as a template for cutting the new sink-mounting brackets. Score the plywood or other surface, making sure that the cut line is at the proper angle. Click here for more.
Your new sink and cabinet brackets will need to be mounted to a sturdy workbench top. Use a level to ensure the accuracy of your measurements. Draw a line with a straight edge across the top surface of the counter depth; this will guide the mounting screws through the holes in the mounting bracket.
Using your measuring tape, measure the inside depth of the basin or counter depth of your new sink. Add one inch to this measurement to account for the clearance behind the sink. It is also important to take into consideration the space available under the sink. If you are replacing an older sink, install the new one on a counter depth that is at least two inches lower than the previous sink. If you are installing a new cabinet, install the cabinet on a counter depth that is at least three inches lower than the previous cabinet.
Once you have the measurements and the number of inches inside the sink to accommodate the new sink, remove the old sink from its brackets and move it inside the cabinet. Install the new sink, taking care not to mark or damage the edges of the sink as you do so. Make sure to leave plenty of room to maneuver inside the cabinet.
To help anchor your new cabinet, use drywall anchors or screw them into the wall at where you secured the cabinet. Otherwise, use stainless steel rivets or stainless bolts. Install all the hardware, including the hinges and the door stop screws, and then attach the bottom of the cabinet to the plywood frame with the plywood first and then with the drywall. You may want to install a second door stop screw so that you can easily close the cabinet once it is installed. Check more on this link.