IT IS FOR WATER CONSERVATION: The larger lever is to flush out around 6 to 9 liters of water, whereas the smaller lever is to flush out around 3 to 4.5 liters of water. Clearly, the larger one is to flush solid waste and the smaller one is to flush liquid waste.
This is your standard dual flush. One is flush, the other is eject. Which is which depends on the manufacturer. Just be careful, the eject can be quite forceful.
As for which button is the right one, it's definitely the one on the right. The other is the left button.
ITT: A lot of Lemmy users showing their true colors. Someone asks for help, for information, and y'all decide to mock.
OP: one button does a full flush, the other does a half flush. In your picture, the button on the right, does the half flush. Button on the left, does the full flush. Full flush is usually just x2, though I don't think that's a hard rule.
This is so wholesome, never be concerned about asking questions like this. Most folks are lurkers, I'm sure your question educated more folks than you realize. Be well out there.
So the smaller seashell shape makes a small flush. The larger seashell shape makes a bigger flush, and the combined seashell shape (both buttons) makes a huge flush.
Allow me to introduce you to the scientific method.
Observation: The buttons are different sizes.
Hypothesis: The size of the buttons could indicate the amount of flushing that occurs when the buttons are pushed.
Experiment: video record the amount of flow resulting from the pushing of the one of the buttons. Wait 60 seconds. Record the amount to flow resulting from the pushing of the other button. Wait 60 seconds. Record the amount of flow resulting from the pushing of both buttons simultaneously. Then compare videos.
Conclusion: __________________
People are joking about this but I have a toilet where the large button is for a half flush. Pressing the small button depresses both buttons performing a regular flush.
I have never found another toilet like this, thank the stars!
The ones I've seen have symbols like "I / II" on the buttons, so you know which is which. Others here have explained the purpose. I guess in your picture, the #2 button is the bigger one.
It's a smaller button inside a larger button (sort of), the smaller (right) button you push to flush your urine and the larger (left) you push to flush your excrement. I've used these many times but if I'm honest I've never actually been sure if they work.
It's a dual flush toilet! They give you an option to make the toilet do a full flush or a half flush. The smaller button operates the small flush, while the larger button operates the bigger flush! The smaller flush is better suited to use when you pee, since it requires less water to flush away.
A lot of the comments are making the assumption that the buttons are telling the truth about being different sizes, but I've flushed plenty of toilets where both buttons do a full flush. If you can't tell the difference after experimenting, it might just be broken or cheap tat.
NSFW is short for not safe for work. The tag is to be put on pictures or texts that shouldn't be viewed when there's a chance of someone else glancing at your screen. I think a picture of a toilet while could raise some questions does not fall into that category.
A selfie I took one autumn morning in 2005. It's the only reasonably normal and presentable picture of myself, as I'm generally not a very photogenic person, so I use it a profile picture everywhere.
The toilet I am currently sitting on has a very similar set up. The toilet came with the house, and I haven't been able to discern a difference in the 8 years I've lived here.