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How To Replace A Basin

Replace Bathroom Basin

Whilst we do highly recommend leaving the installation to a qualified professional, if you’re competent then fitting your own basin can save you quite a bit of money.

Full Pedestal Basins are the most popular type of basins in the UK have been for many years. They’re contemporary and hide unsightly pipework.

Bathroom Basin

Fresh 560mm Basin with Full Pedestal, £64.97

However, they’re also rather difficult to fit which means plumbing costs can be rather steep, especially since it can often double in price after the fitting costs. So if you are an experienced DIY Pro, then here’s how to fit your basin in just 11 steps!

(This guide assumes you don’t need to move any kind of pipework around and have purchased one of our full pedestal basins. If you don’t know which type of basin you have then refer to our Basin Buyer’s Guide here.)

Estimated time – 1 to 2 hours

Required tools:

  • Pencil
  • Spirit Level
  • Assorted screwdrivers
  • Tape measure
  • Drill with bits
  • Silicone sealant
Check you have the following:
  • Basin
  • Pedestal
  • Fixings
  • Screws
  • Washers
What you may need to buy separately:
  • Tap(s)
  • Basin waste

Fitting your basin:

Step 1

Fit the taps and waste onto the basin. It’s easier to do it now, before the pedestal gets in the way.

Step 2

Measure from the back of the basin to the back of the pedestal – this gives you an idea of how far away from the wall your pedestal needs to be, before you drill holes in your floor.

Step 3

Measure across the area where the basin is to be fitted and mark the centre point. Next, use a level to draw a line out all the way down perpendicular to the floor so you know where to place the pedestal.

Step 4

Use the measurement taken in Step 2 and place your pedestal down accordingly. This doesn’t need to be perfect yet.

Step 5

Put the basin on top of the pedestal and place your level on top. Ensure it is level and mark the two holes on either side of your basin so you know where to drill – these holes will be used to secure the basin to the wall.

Step 6

There are two more holes at the foot of the basin which need to be marked out too – these holes will be used to secure the pedestal to the floor (not all basins have these holes so don’t be concerned if yours does not).

(Before continuing, make sure you have clearly marked out 4 holes, otherwise repeat Steps 2 to 5 again)

Step 7

Start by drilling the holes for the basin. If you’re drilling through tiles then use a decent diamond drill bit. Unfortunately, these drill bits don’t hold up against heat very well, so keep a jug of water nearby to dip the bit in every 5-10 seconds. If you’re not drilling through tiles then you will need to use a suitable drill/bit.

Step 8

Once the two holes for the basin have been drilled, put your pedestal back down and put the basin back on top. Line up the basin with the holes and secure the basin in place.

Top tip - Use tap washers to avoid damaging your basin with the screws!

Step 9

Drill the holes for the pedestal and screw them into place.

Step 10

Run some silicon across the back of the basin to seal it off, under the basin where the basin meets the pedestal and also where the pedestal meets the floor.

Step 11

Connect up all the pipes again and check for leaks – tighten connections if necessary. If everything is looking good then you’re finished.

DIY can be a good way to save on the installation costs however, you should always hire a qualified professional to install your products. The above instructions are a guide to the steps involved in fitting your new basin and should not be used to attempt full installation without the necessary help or training.

By Peter Wootton 5 months ago 533 Views