Step By Step: How to Install Vessel Sink Drain Without Overflow in 6 Steps

Best Method to Install Vessel Sink Drain

The installation of your bathroom vessel sink drains is one of the most important steps in providing your bathroom with a finished look.

A vessel sink is an attractive and very eye-catching feature of a restroom, but there are some issues specific to their design that must be addressed in order to make them effective.

Usually, overflow drains are not often present in these cabinets due to their placement above the surface of the sink cabinet.

Depending upon whether you have a system in place for filling up your sink bowl with water, this might pose a problem for you.

The pop-up drain that is usually installed on bathroom sinks is usually linked to an overflow as a means of facilitating a proper drainage system.

In vessel sinks, this feature is not provided by design, so a special kind of drainage system must be installed without a connection to the overflow. In order to avoid problems, empty the sink neatly and quickly through the main drain.

In my opinion, these types of sinks will look great in any bathroom and will compliment that bathroom in a great way. In spite of this, many vessels bowls do not have overflow holes because an overflowed vessel can provide an unpleasant sight when it overflows.

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Steps on How to Install Vessel Sink Drain Without Overflow

You can easily install a vessel sink drain without overflow with the right tools and skills. Moreover, it is advisable that you turn off the water supply before getting started on any plumbing work

Materials Required

  1. Pop-up drain
  2. Putty gun or knife
  3. Silicone waterproof putty
  4. P-trap
  5. Plumbers glue
  6. Leveling tool
  7. Mounting ring (optional)
  8. Pencil or chalk
  9. Hacksaw
  10. Wrench

Vessel Sink drain

Step 1: Select the Proper and Best Drain

If you are planning on installing a vessel sink drain without an overflow for your bathroom, you need to select the proper drain. Pop-up drains are the best choice due to their ability to easily be plugged in or unplugged when necessary.

A grid drain is also a good option, but its holes need to be large enough to allow for a fast flow of water.

I recommend the pop-up drain because there is no plugging feature on grid drains. you may consider this point if this feature is important to you.

Soft-touch pop-up drains do not require a lever to operate since they can be opened and closed simply by pressing against the surface.

The plumbing lines of pop-up drains are not connected to the overflow, so they are not as long as those of a standard sink drain.

This shorter pipeline has the advantage of allowing most of the water to drain. When there is no overflow drain, we must rely on this feature to carry our water away safely.

How to install vessel sink drain

Step 2: Position the Sink

You will need to align your vanity sink with respect to the drain holes if there are no overflow drain. To create a visual guide you can mark the edges with a piece of chalk or a pencil so that you know where each edge is.

After you have turned the vessel around two or three times, coat the bottom edge of the vessel with a thin layer of waterproof silicone putty.

Follow the directions of the previous marks when inserting the vessel sink against the vanity drain hole.

Be sure to wait a few minutes before the silicone putty becomes dry in order to ensure that the two holes are aligned perfectly.

If the caulk oozes out of the edges, do not attempt to wipe it off until it has dried. Once you’re ready to install it, just peel off the old putty with a putty knife. As soon as you have leveled the vessel sink you can ensure it is sitting on a flat surface evenly.

You can adjust it in case it is out of alignment before the caulk has dried completely. Until the silicone caulk has completely dried, you should not continue with the next step.

It is important to note that a mounting ring is necessary before caulking glass vessel sinks due to their very thin rims.

Due to the fact that some handmade glass sinks are uneven on the bottom, the mounting ring guarantees proper alignment of the sink bottom with the cabinet below.

After you have installed the mounting ring, you can proceed with setting up the sink as indicated in the following guide.

Step 3: Install Vessel Sink Drain

There are lots of sink models with specific assemblies and drains. However, there may be cases in which you will need to purchase a separate drain if there is a problem.

It should be noted that if a vessel sink does not have an overflow drain, there should not be any connection leading to an offset drain when the main drain is installed.

When you install the drain with the right connection, you can avoid all of these extra components and ensure a fast and easy installation.

Apply a thin coat of waterproof sealer to the drain hole. Make sure you use the right drain model from the vessel sink to connect it to the vanity below.

When the drain is placed in the hole it should fit snugly in it. In order to ensure that the drain is properly sealed and fixed, it is important to ensure that a generous amount of sealant is used.

Under the vanity, you should also make sure that the rubber gaskets on the bottom of your sink, as well as the other mechanisms, are all properly secured.

In the case of vessel sinks manufactured from ceramic or glass, please do not overtighten the drains, as it can lead to destruction of the sink or even cracks in the sink.

Step 4: Install Faucet

When installing sinks, it is usual that the faucet is installed separately from the sink bowl, allowing for easier installation.

It should be noted that the drainage system under the water spigot remains attached to the handle and spigot.

Ideally, you will then be able to install the faucet in accordance with the manufacturer’s instructions, whether it is a single-lever faucet or a double-handle.

In order for the hot and cold lines to function correctly, they have to be connected correctly to the handles. you should seal as much as you can. This will prevent any possible leaks or seepages.

Vessel sink drain

Step 5: Connect P-trap

It must be known that you will eventually have to connect your drain to the sink bowl during the process of installing your bathroom vessel sink.

It is important to look into the area below the vanity once the upper portion of the drain has been correctly installed.

It is possible to reduce the length of the drain pipe using your hacksaw if you find that it is too long when compared to the space under the vanity.

It is recommended that you connect a P-trap to the pipe exiting from the bottom of the drain. In order to make the pipe connection easy, it should be threaded at the end so that it is easy to screw them together.

You need to connect the P-trap’s other end to the main pipe on your wall, and you are ready to go.

Glue the ends together to make them waterproof and airtight.

Additionally, you may use your wrench to tighten them together. You should avoid overtightening because overtightening can cause breaks and cracks

Install Vessel Sink Drain

Step 6: Turn On Water Supply

The first thing to do is to turn on the main water supply and to watch for leaks or other problems above and below the sink.

After the sink has been completely filled, you must let it drain and examine it for any problems. The water will be properly drained out without any delay and at an ideal rate.


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Hopefully, after reading this article, you now understand how to install a vessel sink without overflowing it.

It is recommended that a drain that is shorter from the plumbing side should be used in the absence of additional features.

A sink without an overflow must have fast and complete drainage. It’s true that grid drains are very useful, however, they can’t be stopped, which might cause some inconveniences to the end user.

In contrast to pop-out drains, pop-up drains give you the ability to fill your sink as much as needed.

Considering the fact that you have this extra capability, it is a good idea to take care whenever you use the sink as it could become overfilled, which could cause havoc.

It is important to mention that pop-up drains come with a soft-touch system that makes it quick and easy to open in case you are in an emergency and need to empty the sink.

You can easily install vessel sink drain without overflow if you have the correct tools.

Vessel sinks are convenient to work with because they are placed above a vanity and do not have a built-in overflow, which allows them to be mounted quickly and easily.

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