When upgrading or installing a new basin or bath, choosing the correct waste is essential for proper drainage and to prevent leaks or overflow issues. Although most wastes look similar, selecting the wrong type can lead to malfunctioning overflows, flooding, and property damage. This guide explains the difference between slotted and unslotted wastes to help you determine which one is right for your bathroom.
Slotted and Unslotted Wastes
All basins and baths have a waste hole for draining water. Some modern designs include an integrated waste, but most still require a separate one for customisation. Many modern taps come with a waste included. Wastes allow water to drain and can be closed to fill a basin or bath.
Traditional wastes used plugs; modern wastes use mechanical stoppers.
Unslotted waste: Completely watertight when closed. Suitable for basins and baths without an overflow.
Slotted waste: Contains slots to allow water from the overflow to drain. Required for fixtures with an overflow.
Types of Waste Styles
1. Plug and Chain : Simple, traditional, dependable.
2. Click-Clack / Push Button Waste: Opens and closes by pressing down on the stopper. Easy to install and widely used.
3. Pop-Up Waste: Operated by a lever connected to the basin or bath. Modern versions often use a handle in the overflow for a minimalist look.
4. Flip Top Waste: Features a hinged, disc-shaped stopper. Opens and closes with light pressure. Sleek, modern appearance resembling a spinning coin.
How to Choose the Correct Waste
Check whether your basin or bath has an overflow:
- With overflow : choose a slotted waste.
- Without overflow : choose an unslotted waste.
- If your overflow exists but requires a separate connection, an unslotted waste is typically needed.
- The overflow prevents flooding by draining excess water once it reaches a certain level.
- The slot in a slotted waste allows this overflow water to pass into the drain even when the waste is closed.
- Retailers often label wastes clearly as “slotted” or “unslotted,” making it easier to buy the correct one.
Conclusion
Choosing between a slotted and unslotted waste depends entirely on whether your basin or bath has an overflow system. With numerous designs and styles available, you can select a waste that not only complements your bathroom’s look but also ensures reliable and safe operation. Taking the time to choose the right waste will help protect your bathroom from leaks, improve functionality, and enhance your overall bathroom experience.
Written by Sue K.
Sue K. is a bathroom design enthusiast and product specialist who enjoys writing Bathroom Inspiration blogs and sharing helpful advice on how to choose and care for the right bathroom products.
