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How to Install a Bathroom Sink? Techniques and Tips...

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Methods to install a bathroom sink vary with the type of the sink. Here are given different methods to install self-rimming, drop-in bowl sinks, pedestal sinks, wall mounted sinks and vanity or cabinet type sinks. However, the links below shall lead you to details of many sinks and help you to take proper care while installing a sink in your bathroom.

Self-rimming, Drop-in Bowl Type Sinks

To install a sink begin by cutting out a hole in the counter top for the bowl. If you were not provided with a template with the sink, set the bowl upside down on the countertop and trace the outline, then draw a second line about ¾ inch inside your traced line . This will be your cutting line. Remember to center your template front to back and side to side. Now you can drill a hole wide enough for a saber saw blade against the inside of the cutting line. Using the saber saw, cut along the line.

Before you set the bowl in place install the faucets, and the flexible water pipes attached to them. When these are in place, turn the sink upside down and spread some silicone adhesive along the underside of the lip of the sink. Turn the sink over and align straight in the hole. Press firmly all round the edge to form a tight seal. When the adhesive is dry, caulk the edge with silicone.

The drain fitting in the hole in the sink is normally positioned so that the basin is clamped between the top part where the plug goes, and the bottom where the water drains away. The top ring should be have plumber’s putty or silicon sealer underneath, where it fits into the hole in the sink, and the bottom part consists of a rubber gasket that is pressed against the bottom of the sink by a brass washer and a nut. This should also be caulked to ensure that the whole fitting is watertight. Screw in the top section as far as possible, then tighten the nut below with a pipe wrench, so that the whole fitting is sealed nice and tight. Now you can install the trap and connect up with the drainpipe protruding from the wall. Attach the flexible water pipes to the water pipes protruding from the wall, as per manufacturer’s instructions.

Pedestal Sinks

These sinks are made up of two parts: the sink and the base or pedestal. Normally the pedestal does not support the sink by itself, so when you install a bathroom sink of this type, you should use one or two brackets fastened to the wall to make it more secure. You should go carefully over the manufacturer’s instructions. You need to temporarily remove a small section of drywall behind the basin and install blocking between the wall studs in the wall to give extra support to the sink brackets. The base should be fastened to the floor with tile adhesive, and the joint between the tiles and the floor caulked. The faucets and the drain fittings are attached to the outlets in the wall.

Wall-Mounted Sinks

In the same way as the pedestal sink, the wall-mounted sink is going to need blocking between the studs in the wall behind it to provide a strong mounting for the brackets. To determine where you need to install blocking between the wall studs when you install a bathroom sink of this kind, measure your sink, the brackets, the wall stud positions and the height above the ground that you wish to mount the sink. This is normally 30 inches above the floor. Drain fittings for a wall-mounted sink are usually decorative, such as chrome, or hidden behind a decorative cover that is either part of or supplied with the sink.

Vanity or Cabinet Type

The tricky part of this is to measure very carefully, so that you don’t damage the cabinet you plan to use when you install a bathroom sink.

Mark on the floor and on the wall the dimensions of your vanity. You need to locate one or two wall studs to secure the back of your vanity to the wall. Temporarily remove any drawers and cupboard doors and shelves that you can from the vanity. Accurately mark on the back of the vanity the exact positions and dimensions of the holes for the water inlet pipes, and drainpipe.

Mark the spots where you plan to screw the vanity to the wall studs. Use a hole saw about ½ inch larger than the dimension of each pipe to cut the holes, and drill the holes for screws. When you move the vanity into position to do the plumbing and fastening to the wall, slip shims under the cabinet to level it if necessary. Finally, caulk the edge of the counter top where it meets the wall tiles with silicone to ensure that no water can seep down the back of the vanity.

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Two sinks for One  starstarstarstarstar
I have an old bathroom vanity with one sink. I want to know about installing a new vanity with two sinks. I know I have a choice to call a plumber but ...