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Step-by-Step Guide: How to Fit a Basin and Pedestal

by E Cavendish 13 Mar 2024 0 Comments
Step-by-Step Guide How to Fit a Basin and Pedestal

Fitting a new basin and pedestal can dramatically transform the look and functionality of your bathroom. Whether you're renovating or simply updating your fixtures, installing a basin and pedestal is a task that can be accomplished with some DIY skills and the right tools. This detailed guide will walk you through the process, ensuring a successful installation that not only looks professional but also stands the test of time.

Tools and Materials Needed:

  • Adjustable wrench
  • Basin wrench
  • Spirit level
  • Silicone sealant
  • Drill and bits (appropriate for your wall type)
  • Wall plugs and screws
  • Pipe cutter (if adjusting plumbing)
Round Countertop Basin

Step 1: Preparation

Before beginning, ensure that the water supply is turned off to avoid any unexpected leaks. Remove the old basin and pedestal, if applicable, and clean the area to prepare for the new installation.

Step 2: Assemble the Basin and Pedestal

Unpack your new basin and pedestal. It's a good idea to dry fit these pieces together in their intended location to ensure they fit correctly and to mark any drill holes for the basin if necessary.

Step 3: Mount the Basin

  • Use a spirit level to ensure the basin is level when placed on the pedestal.
  • Mark the wall through the mounting holes in the back of the basin.
  • Drill holes into the wall at the marked spots, insert wall plugs, and then secure the basin using screws. Do not fully tighten the screws until you've ensured the basin is perfectly level.

Step 4: Connect the Plumbing

  • Attach the tap and waste to the basin before securing it to the wall, as this is usually easier to do when the basin is not yet fixed in place.
  • Once the basin is secured, connect the water supply lines to the tap and the waste pipe to the waste outlet, using a basin wrench for tight spaces. Ensure all connections are tight to prevent leaks.

Step 5: Secure the Pedestal

Position the pedestal under the basin, ensuring it's perfectly aligned. The pedestal is not typically fixed to the floor, but it should be snug against the basin to support its weight.

Washbasin with Full Pedestal

Step 6: Apply Silicone Sealant

Apply a bead of silicone sealant around the base of the basin where it meets the wall to prevent water from seeping behind it. You may also apply silicone around the base of the pedestal for a clean finish, although this is optional.

Step 7: Final Checks

Turn the water supply back on and check for any leaks at the tap and waste connections. Tighten any fittings as necessary. Once you're satisfied there are no leaks, fully tighten the screws securing the basin to the wall.


Installing a basin and pedestal is a rewarding DIY project that can significantly enhance your bathroom's appeal. By following these steps and taking your time to ensure accuracy, you'll achieve a stable and leak-free installation that adds both style and function to your bathroom.

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