So.. what are some ways to reduce toilet water? One method that popped up on several internet searches was to use a plastic bottle to convert your toilet to a low flush toilet. Watch this handy video below:
Now, let's say you are willing to spend some dough on a toilet upgrade. What are your options? First is a dual flush toilet, that lets you choose your level of water output in a "binary fashion" between large and small, for obvious reasons. My first exposure to dual flush toilets was my first time to Japan, where all toilets have dual flush options (along with many other options, such as seat heating and bidet functionality, but we won't get into that here). Apparently the technology was first invented by an Australian!
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Although dual-flush is certainly not the standard in the U.S. yet, a quick look around online shows a range of dual-flush toilets available, generally around $400-800. That is a pretty hefty investment for a young homeowner, with a payback period of around 3-5 years, depending on the source. However, there is also a DIY approach to dual flush. Conversion kits are available for as low as $30.
So, let's do the math once again. If one converts to a dual-flush toilet, either by new model or DIY, let's assume two flushes per day are of the smaller quantity variety. With the changes our daily output comes to an average of 6 gallons a day, which with the low-flow conversion (plastic bottle) above turns into about 4.5 gallons a day, for an annual output of about 1640 gallons. Still a significant number, but about 1/2 as much as when we started, and for only $30 and at max a few hours of work!