A dual-flush toilet has two flush options: a smaller flush for liquid waste and a full flush for solid waste. Instead of a single handle, it usually has two buttons on top of the tank, letting you use less water when a full flush is not needed.
How It Works Inside
Instead of a rubber flapper, most dual-flush toilets use a flush valve that lifts up like a cylinder. Pressing the small button lifts the valve for a shorter time, releasing less water. Pressing the large button lifts it fully, emptying more of the tank. Many designs also have a wider opening at the bottom of the bowl, which helps waste move with less water.
Benefits
- Can save water compared with toilets that always use a full flush
- Fewer moving parts like chains that can tangle
- Often quieter than older toilets
- Buttons on top can be easier to reach
Common Issues
Dual-flush toilets have their own quirks. The seal on the flush valve can wear and cause a slow, silent leak into the bowl. Buttons can stick if cables or rods inside get out of adjustment. Using only the small flush for solids can lead to clogs. Some bowls need cleaning more often because less water rinses the sides.
Tips for Use
Teach everyone in the house which button is which. Most have a half-moon or smaller button for the light flush. If the toilet runs or refills on its own, check for a worn valve seal. Replacement parts are usually model-specific, so note the brand and model inside the tank lid.
A dual-flush model can be a good choice when replacing an older, high-use toilet.
If your dual-flush toilet is leaking or not flushing well, getting the flush valve repaired often solves it. For help picking a new toilet, you can compare models with a plumber at (833) 603-1840.