Underslung Basins

We stock a range of underslung wash basins, manufactured by respected sanitary ware manufacturers such as Armitage Shanks (Ideal Standard) and Twyford, available to order on our website for quick delivery. Underslung wash basins are primarily designed to be fitted under a solid surface countertop or in rare occasions under a solid grade laminate countertop.

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  1. RAK-Lily 46cm Over Counter Wash Basin | Commercial Washrooms
    RAK-Lily 46cm Under Counter or Over Counter Wash Basin

    As low as £54.00 £45.00


  2. Franke RONDO Stainless Steel Inset Vanity Basin 200mm Polished Finish
    Franke RONDO Stainless Steel Inset Vanity Basin Various Sizes
    As low as £56.40 £47.00

  3. RAK-Rosa 50/57cm Under Counter Wash Basin | Commercial Washrooms
    RAK-Rosa Under Counter Wash Basin - 50/57cm Width

    As low as £60.00 £50.00


  4. RAK-Cleo 51cm Under Counter Wash Basin
    RAK-Cleo 51cm Under Counter Wash Basin

    As low as £106.80 £89.00


  5. Armitage Shanks Cherwell 21 Round 38/48cm Under-Countertop Washbasin
    Armitage Shanks Cherwell 21 Round 38/48cm Under-Countertop Washbasin

    As low as £151.20 £126.00


  6. Armitage Shanks Contour 21 42cm Rectangular Under-Countertop Washbasin
    Armitage Shanks Contour 21 42cm Rectangular Under-Countertop Washbasin

    As low as £169.66 £141.38


  7. Armitage Shanks Strada 60cm Under-Countertop Washbasin
    Armitage Shanks Strada 60cm Under-Countertop Washbasin

    As low as £192.00 £160.00


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Underslung Basins for Commercial Washrooms

Underslung wash basins (also known as under counter basins) are designed to be installed within countertops.. The top is cut with the same profile as the top of the bowl and the wash basin is attached from underneath the countertop by a chemical or mechanical bond. Underslung basins are popular for both domestic bathrooms and commercial washrooms due to their sleek, contemporary appearance and minimalist style.They’re also very easy to clean thanks to the fact they don’t have raised lips around them, making cleaning and maintaining commercial washrooms a quicker task. We stock a range of underslung basins, available in different shapes and sizes, so you’re sure to find the right option for your washroom’s needs.  

Under counter basins are attached to the worktop surface from the underside of the top and so are not supplied with tap holes, but they are available in a variety of sizes and shapes to create a truly unique washroom design. An alternative to an under counter wash basin, should you not wish to cut your worktop, would be a lay-on basin, which instead would sit on top of the worktop and holes need only be drilled for the waste and taps.

Many common questions and general advice on basins and sinks can be found by reading our blog. Of particular relevance is the Washroom Sinks information and questions. Browse our Washroom Case Studies where many of our basin and sinks have been included.

If you are looking for a particular underslung basin and are unable to see it on our website, or would like any advice on our products, then please get in touch with our sales team via phone or email and they will be happy to assist.

Underslung basin FAQ

What is an underslung basin?

An underslung basin (also known as an under counter basin or undermount basin) is typically fitted under a countertop and attached to a worktop’s surface from beneath. They are popular for their contemporary style and practicality as they’re very easy to clean. 

Why choose an underslung basin? 

There are many benefits of having an underslung basin in your washroom, including:

  • They’re easy to clean - as there is no lip around the underslung basin, it’s very easy to wipe around the sink counter

  • They’re modern - underslung basins have a contemporary, sleek look to them so you can add style to any commercial washroom

  • They’re affordable - here at Commercial Washrooms, we have a range of underslung basins at competitive prices

  • They’re available in a variety of styles - underslung basins are available in a range of shapes and sizes, so there’s something to suit every commercial washroom

How to fit under counter sink

Please note that it is recommended that you hire a professional to fit an under counter sink to ensure it is installed correctly. 

  1. 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. 

  2. 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). 

  3. 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.

  4. 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. 

  5. 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.

  6. Place something that can support the underslung basin under the countertop - some people stack wood boards for this step. 

  7. Place the basin in the centre of the hole in the countertop and clamp the basin for support as you fit it into position. 

  8. 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.

  9. Clean the area and mount your taps, connecting them to the water supply.