How To Install A Kitchen Sink In A New Countertop?

Consider installing a sink if you want to give your kitchen some more style and functionality. It’s a terrific method to cook or clean more conveniently while saving space.

It should be simple and quick to attach a kitchen sink to your new countertop.

Before you begin the sink installation process, you must be aware of the necessary tools. Let us give you a basic sense of the equipment required and the likely price.

Equipment Required For Installing A Kitchen Sink:

The following equipment is required for sink installation in kitchen countertop.

  • A tube cutter
  • Drill/driver
  • Engineer’s pliers
  • Jigsaw
  • Screwdriver
  • Measurement tape
  • Handy knife
  • A flexible wrench
  • Horizontal edge
  • Hacksaw
  • Shovel bit

Step-By-Step Directions For Installing A Kitchen Sink

How To Install A Kitchen Sink In A New Countertop?

For a kitchen sink installation that fits you perfectly, follow the steps below. This task could take you 4-6 hours to complete.

Gather All Required Materials

The first step in installing your kitchen sink is to gather the required supplies. That equipment is necessary for carrying out the installation task. Therefore, gather the tools indicated above in order to complete a successful installation.

Get a new kitchen sink that meets your needs. Now carry out the subsequent actions for installing your kitchen sink in a new countertop. Without fail, make sure there is enough lighting for this task.

Layout The Sink And Mark And Measure.

Now that you have marked the edges, you can accurately measure your sink. Check to see whether your sink has a template. Follow the steps listed below to achieve the appropriate measurement.

First, use a template to mark the sink’s cabinet and center on the back border of the counter. Align the countermark with the sink template. Place its back edge 112″ from your kitchen counter’s parallel edge and move on to the following stage.

In contrast, if there is no template, mark the placement of the sink with 2′′ pieces of tape. On the back lip of the sink, trace a line through the center. Align the countermark with the sink while placing the sink on the counter upside down.

By adjusting the sink, leave 112″ between the backsplash and back edge. Like before, trace all around the sink, then take it out. Measure the area inside the sink’s outline and deduct 1/8″ for the lip. Utilizing the straightedge to connect all marks, create the cut-out lines at this point.

Mark The Counter’s Cut Lines

A straightedge was used to connect each mark, creating a rectangular outline. The counter sinkhole will be located at the end of this rectangular shape. Now use your hands to round the corners to a rough approximation of the radius sink corners.

Use a spade bit that is 12″ wider than the jigsaw blade after roughly estimating the sink’s corner. Create a hole in the part of the radius now.

Cut A Sink Opening Using A Jigsaw

Time to cut a sink opening now. On your sink, use a jigsaw to create a space. By aligning the cut line with the back hole, you can begin cutting from the front hole. However, to do this, cut the sink opening by inserting your jigsaw blade into a front hole.

Repeat the same for the additional holes after that. Pick up a piece of wood that is longer than the cutout over the sink. But now screw into the waste from the cutouts and through the scrap wood. It will stop it from falling or touching the blade.

Be determined to achieve the ideal cut using both the front and back cut lines. After that, take the cut-out portion out of the sink. Check to see if your sink will fit on your new countertop, though. If you require a slightly larger hole, use the jigsaw to close the space.

Start Installing The Kitchen Faucet

How To Install A Kitchen Sink In A New Countertop?

The kitchen faucet needs to be installed in this step. Set up a sawhorse or padded counter first. On that sawhorse or counter, flip the sink over. Place the supply of the faucet across the gasket, nevertheless. The supply tube and tailpiece will fit through the hole(s) in your sink.

The kitchen faucet is sealed to your sink by the gasket. Screw the undermount washer and nuts using the underside sink deck. The faucet should be able to swing easily over the sink before tightening the mounting nuts.

Screw The Strainer On

So far, the kitchen faucet has been installed flawlessly. The strainer needs to be attached over the plumber’s putty now. Now roll up some plumber putty into a thick log and set it beneath the strainer lip. Now raise the putty roll through the drain hole in the sink. While the sink is still upside-down, complete this task.

Insert the washer, gasket, and housing from the provided strainer supply through the strainer. Work in opposition to the sink’s underside. But right now, apply a pipe-joint compound to the threads that are exposed. Use your hands to carefully thread the locknut into the strainer.

Holding the strainer in place, tighten the nut with pliers. Attach the gasket to the strainer using a gasket slide nut on the drain tailpiece. To ensure precise fitment, grasp the strainer with one hand and tighten the nut.

After Installing The Sink, Turn On The Water Supply

Squeeze a silicone caulk bead to secure the sink. Therefore, take a bead and wrap it around the underside of the sink’s lip. While the sink is still upside-down, carry it out. But take off the tape by pushing in the direction of the sinkhole’s center.

Insert the upright sink now into the hole in the countertop. With the front edge of the countertop, adjust the front of the sink. Connect the sink faucet to the shut-off valves using acorn-head supply tubes or braided stainless steel hoses. The sprayer hoses should then be connected to the F faucet threaded tailpiece.

Connect The Drain Pipes

To attach the drain pipes, arrange the trap adapter onto the sink-drain tailpiece. Prior to attaching the trap adapter to the corner, divide the PVC pipe into dry-fit lengths. Connect the sink waste line to the drain elbow. The trap can, however, be slid or turned through the tailpiece.

You can use it to refine the pipes’ lengths and alignment. Remove the suspend with a utility knife, then prime the PVC end parts. Please wait till it dries before continuing.

Place the two PVC joints together and apply PVC cement using a swab. Right away push them together, then wait 30 seconds. After that, hand-tighten each threaded connection before reassembly.

Connect The Drain Line For The Dishwasher

The installation of your sink is almost complete. Now secure the dishwasher drain thread with the tailpiece waste nib. The hose bracket should be tightened using a screwdriver. If any spare putty is still present, remove it from the strainer’s head before removing the fan from the faucet.

Run the water on the tape at full speed to check for leaks in the connections, drain, and supply lines. If there are any leaks, you should tighten the nuts by one-eighth of a turn until the leaks stop. Set the front edge of the sink parallel to the border of the countertop. Fill the sink with water to weigh it down, then leave it there overnight to cure the caulk.

Related Questions

Can you put a sink before a countertop?

Before the countertop slabs are put down, an undermount kitchen sink must be installed. Once the countertop slabs are in place, it’s frequently impossible to get the sink through the hole and create a tight seal between the sink and the countertop’s underside.

Do you require a sink trap?

You still need a p-trap under your sink to keep gas out even if you take great care to never put anything down the drain. Your home’s drain pipes can allow sewer gases to rise, but the p-u-shaped trap’s bend gathers water. This water prevents the gases from entering your sink and rising.


Kitchen sink is a useful appliance since it’s used for the disposal of waste into sewerage system. Installing a unit that meets your needs can boost sink utility and give you more advantages.