Slotted vs Unslotted Basin Wastes

By Greg

16th Dec 2021

4 mins read

DIY & Technical

Wondering whether you need a slotted or unslotted basin waste? Confused by the choice in finishings for your basin? Read this guide to easily work out what type of basin waste you need.

chrome basin plug

Deciding upon what basin waste, bottle trap or finishings can be a daunting task for someone that doesn't know how to tell the difference between a slotted and unslotted waste. It is good to note that a lot of taps can come complete with a waste, so choosing a tap first can be beneficial. However, knowing the right waste to choose is important. Fitting the wrong waste may result in water leaking onto your floor or your overflow not working or both.

What is an Overflow?

First, it is important to understand what an overflow is because once you have established that, you can correctly identify the waste that your basin requires. An overflow is a small hole so that when the water fills up the basin and begins to get too full, the overflow will drain the excess water away. They are most commonly found at the back of the basin, just under the tap.

What is a Waste?

Whether it’s a pedestal, wall hung or countertop basin, they will all use a waste. A waste is a channel designed to allow the water in your basin to run away. Another use for it is to use it as a barrier to block the pipes so you can fill up your basin with water.

Do I need Slotted or Unslotted?

If your basin has an overflow it will require a slotted basin waste. Therefore use an unslotted waste where basins are designed without an overflow. At Victorian Plumbing we make sure that all of our range is clearly stated as being slotted or unslotted to make your selection effortless.

Unslotted Click Clack Basin Waste
Unslotted Click Clack Basin Waste

Different Types of Wastes

What is a Plug and Chain Waste?

This is the most traditional form of waste. It consists of a plug (either plastic or metal) that is connected to a chain that can be moved to cover the waste hole or put to one side when not being used. However, you may find that with more modern basins that there isn’t a hole for the chain to be fitted to. Simply, ask before making your purchase.


What is a Click Clack Waste?

This is the most popular option of wastes, as it has a simple design making it easy to use. You simply push down on the stopper once to close it and click it again to open it. Click clack wastes are also referred to as push button wastes or sprung plug.

What is a Flip Top Waste?

This is a disc shaped object that is hinged on either side vertically, meaning that you rotate the stopper and water can flow through or be stopped for filling the basin. A minimalist design and an easy to use function.

What is a Pop-Up Waste?

This works with the use of a lever operation. The lever is pulled up to lower the waste stopper, or pushed down to act as a barrier.

Easy Clean Slotted Basin Waste
Easy Clean Slotted Basin Waste


Greg is one of our most regular bathroom bloggers here at Victorian Plumbing. He's always looking for the latest bathroom trends and styles and will be posting them here regularly. He'll also be posting practical 'How To' step-by-step DIY advice and reporting on his latest bathroom ideas at Victorian Plumbing.

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