I think this is because dual flush is more modern, so newer built buildings or ones that are often renovated like businesses or airports would have them. I’ve seen the dual flush top button on new residential builds because it wastes less water and therefore more economical.
My grandmother’s house had a push-button flush in the early 80s when I visited, so probably earlier. She wasn’t wealthy or anything, and it wasn’t a new house at the time. How “modern” is modern?
I don’t think they’re modern in the sense that they were recently invented/introduced, but modern in the sense that they’re now becoming a lot more popular in places that have municipal/city sewer hookups.
Anecdore time: my grandparents built a little cabin on an island when they retired (more Puget Sound than tropical, they weren’t bajillionaires lol), but they had one 30 years ago, alongside an outhouse, simply because draining a septic tank on an island cost a fortune. Septic service company basically uses a pontoon retrofitted with a tank and built up to float with that much weight, and they’d have to transfer that to a septic truck in order to haul it away on the mainland.
They’ve been around for quite some time, but 20+ years ago you’d probably only encounter them being used in niche places like that, or in a recreational vehicle, or in other parts of the world where the cost of municipal water is a consideration
I think this is because dual flush is more modern, so newer built buildings or ones that are often renovated like businesses or airports would have them. I’ve seen the dual flush top button on new residential builds because it wastes less water and therefore more economical.
My grandmother’s house had a push-button flush in the early 80s when I visited, so probably earlier. She wasn’t wealthy or anything, and it wasn’t a new house at the time. How “modern” is modern?
I don’t think they’re modern in the sense that they were recently invented/introduced, but modern in the sense that they’re now becoming a lot more popular in places that have municipal/city sewer hookups.
Anecdore time: my grandparents built a little cabin on an island when they retired (more Puget Sound than tropical, they weren’t bajillionaires lol), but they had one 30 years ago, alongside an outhouse, simply because draining a septic tank on an island cost a fortune. Septic service company basically uses a pontoon retrofitted with a tank and built up to float with that much weight, and they’d have to transfer that to a septic truck in order to haul it away on the mainland.
They’ve been around for quite some time, but 20+ years ago you’d probably only encounter them being used in niche places like that, or in a recreational vehicle, or in other parts of the world where the cost of municipal water is a consideration