Tools required for Installing a Bathroom Sink
Installing a Bathroom Sink - Begins with Finding and Buying the Right One
The first thing
that you need to do is purchase the right size overmount bathroom sink for your
bathroom vanity countertop. Make sure when measuring the depth of your bathroom
vanity and countertop you account for any backsplash. A backsplash will reduce
the maximum allowable depth of your bathroom sink by approximately 1-2 inches.
The width of your
bathroom sink is dependent on the width of the bathroom vanity cabinet you plan
on installing the bathroom sink in. Check the inside of the vanity cabinet to account for any
drawers or other obstacles that could limit the size of the bathroom sink that
can be installed.
If you are replacing a bathroom sink
the task of selecting a new one is a little easier. You have a pre-defined hole
that already specifies the size of the bathroom sink you can install. You may be
able to, however, install a larger bathroom sink if there are
no obstructions underneath the cabinet and you are willing to cut a larger
Note: If there are
separate holes for the bathroom faucet handles and spout you will need to
account for them in your selection of a new bathroom sink.
If you are
replacing an old bathroom sink, first turn off the water supply valves
underneath the bathroom sink.
disconnect the supply and drain lines from the bathroom faucet. Note that a
bucket comes in handy at this stage to catch the small amount of water that
is located in the J-trap.
Remove any sink
hold-down fastener clips that maybe holding the bathroom sink to the
bathroom vanity countertop.
Using a putty
knife, slide the edge of it around the perimeter of the bathroom sink to loosen
any caulk that maybe forming a seal around the bathroom sink.
Now simply pull the
bathroom sink out of the bathroom vanity countertop.
Cutting an opening for the to be Installed Bathroom Sink
If you are
installing a new bathroom sink, you will need to use the template which should
have come with the bathroom sink to trace out the rough opening for it.
Center the template
on the bathroom countertop in the location of where you want the bathroom sink
to reside. The template should be positioned approximately 2 inches back from
the front edge of the countertop.
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Once you have
located the position of the template secure it with tape.
Using a pencil,
trace around the template.
Note: If a template
did not come with the bathroom sink, simply turn the bathroom sink upside down
and position it properly over the bathroom countertop and trace around it. Then
remove the bathroom sink and draw another outline that is approximately ½” in
from the first outline you drew. You will cut on this second inner line. This
inner line will enable the bathroom sink flange to rest on the bathroom
template, and drill a couple of 3/8 inch pilot holes near the inside edges of
the template area. Make sure the holes are within the boundary of the template
Using your jig saw,
insert it into a pilot hole and begin cutting on the inside edge of your
outline. Have someone underneath the bathroom countertop holding the cutout
piece in place until you have completely cut around the outline. This will
prevent the cutout piece from breaking off and possibly damaging the surface of
the countertop. Warning: make sure the person
underneath the countertop is wearing eye protection and that his or her hands
are away from the saw blade at all times.
You may also need
to drill holes for your faucet supply lines and spout, depending on what type of
bathroom sink you are installing.
To minimize your
work underneath the bathroom countertop it is best to attach the bathroom faucet
to the bathroom sink before you install the bathroom sink.
Turn the bathroom
sink upside down and attach the faucet to the bathroom sink using a crescent
wrench. Make sure to first apply a bead of caulk or plumbers putty to the faucet
base before attaching it to the bathroom sink.
Now attach the
flexible supply lines to the faucet assembly. Again, use your crescent wrench to
tighten the supply lines to the bathroom faucet. Do not over-tighten as you
could potentially crack the bathroom sink.
Clean around the
cut out area removing any sawdust or loose debris.
Apply a bead of
silicone caulk around the perimeter underside flange area of the bathroom sink.
Turn the bathroom
sink/faucet assembly over and position it into the cutout area. Make sure the
supply lines are properly fed into the supply line holes if required.
Press the bathroom
sink firmly into place and immediately remove any excess silicone caulk.
bathroom sink, fasten the bathroom sink to the bathroom countertop with
hold-down fastener clips, if fastener clips came with the bathroom sink.
Sink Drain Assembly and Supply Lines
With the bathroom
sink installed, run a bead of plumbers putty around the bottom of the sink drain
area and install the sink drain and drainpipe assembly. There is a lock nut
washer assembly that holds the sink drain to the bathroom sink. Use a pair of
channel lock pliers to tighten the lock nut washer.
Connect the J-Trap
assembly to the sink drainpipe using your hands and/or channel lock pliers.
flexible bathroom supply lines to the house water supply lines using your
Turn the water
supply lines back on and test to see if the bathroom faucet operates correctly
and that there are no leaks around the sink drain assembly or supply lines. If
there are, turn off the supply lines and gently tighten the offending
After testing the
bathroom sink and faucet, let the bathroom sink set up overnight before using
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