Basin Wastes & Plugs

Small but essential, your basin waste does more than you might think. From keeping water where you want it to preventing pesky leaks and blockages, it’s a key part of how your bathroom sink works day to day. Whether you’re upgrading your bathroom or fixing a faulty fitting, our guide below covers what you need to know.

 

What is a basin waste?

A basin waste controls how water flows out of your basin (or stays put when you need it to). Fitted neatly into the drain hole, it channels used water safely into the waste pipe, keeping everything clean and efficient.

When closed, the waste seals the plug hole so you can fill the basin for washing or shaving; when open, it allows water to drain smoothly away. By catching debris before it reaches the pipework, it also helps to prevent unwanted blockages and keeps your basin running as it should.

 

Are basin wastes a standard size?

Yes, basin wastes are made to a standard size, so you can usually replace or upgrade yours without worrying about compatibility. The typical measurement for a basin waste is 1¼ inches (32mm), which fits the majority of bathroom sinks.

 

What is the difference between a slotted and unslotted waste?

The key difference comes down to whether your basin includes an overflow. A slotted basin waste features small openings that allow excess water from the overflow to drain away safely, helping to prevent spills and leaks. This makes it the correct choice for basins designed with an overflow hole.

An unslotted basin waste, on the other hand, is intended for basins without an overflow. It creates a sealed fit, allowing the bowl to fill and empty as required without any additional drainage channel.

 

Is it easy to change a basin waste?

Yes, replacing a basin waste is a straightforward task that most people can manage.

If your current waste is rusty, worn or no longer working properly, swapping it out can instantly refresh your basin’s look and function. All you'll need are a few basic tools, such as pliers, a bucket and a good quality silicone sealant.

The process involves disconnecting the old waste, cleaning away any leftover sealant and fitting the new one securely with the right washers and seals in place. Once tightened and connected to the trap, you’ll have a clean, fully functional basin ready to use again. For more information, read our guide on how to fit a basin waste.