Please note that it is recommended that you hire a professional to fit an under counter sink to ensure it is installed correctly.
Firstly, you’ll need to get the measurements for your new under counter sink. If you’re replacing a sink, measure the hole in the countertop to determine the sink size you’ll require or take measurements of your old sink if you still have it.
Determine where you’d like to install your underslung sink if it’s moving to a different countertop (you must also take into account where your water supply is).
Decide which reveal style you’d prefer (how much of the underslung basin’s rim is visible). “zero reveal” is popular as this is easiest to clean and has a contemporary look.
Trace the outline of your under counter sink - your underslung sink may come with a template which you can trace around or you can turn the sink over and trace around it on the countertop.
Use a jigsaw or a circular saw to cut into the countertop following your trace - please make sure you wear the appropriate safety gear for this (i.e goggles to protect your eyes and a dust mask to prevent you from breathing in dust). Wipe the countertop clean when you are finished.
Place something that can support the underslung basin under the countertop - some people stack wood boards for this step.
Place the basin in the centre of the hole in the countertop and clamp the basin for support as you fit it into position.
Install studs to the underside of the countertop and caulk around the sink to secure it. Once this is complete you can tighten the clamps to raise the basin and install sink clips and wingnuts over the studs.
Clean the area and mount your taps, connecting them to the water supply.