Dual Flush Conversion

A few weeks ago, Jeremy and I converted the toilet in the hall bathroom into a dual-flush toilet. After reviewing our utilities, we saw that the one bill that hasn’t decreased over the years was our water bill. We hoped that converting our most used toilet into a dual flush toilet could help save more water (and monies).

Jeremy did the research and decided on the One2Flush drop-in converter kit. You can read about the kit and installation instructions here. Jeremy chose this kit because it comes with both a button and a handle. We thought that the double button would be more obvious to guests that this is not a “normal” toilet. With the handle, Jeremy worried that people would not realize that half-flush was an option. Another reason why we chose this kit is because it claims to fit most toilets and completely replaces the rubber flap. The flap is replaced with a piston mechanism that flushes the water out with an increased force. This allows the toilet to flush effectively with less water.

P1080284 P1080289The first step was replacing the rubber flap with the silicone seal that connects to the piston mechanism. In the first photo you might notice the ridges on the sides of the pipe. These ridges prevented the seal from fitting securely on top of the opening. A loose fit means that the toilet will keep running. Jeremy used his dremmel to shave down the sides of the pipe and make it smooth. Then he was able to secure the silicone seal and install the rest of the kit.

Complete KitHere is the final installation. On top of the seal is the piston mechanism. On this device is where you can set the water levels for “full” and “half” flushes. We have them both set to their minimum. This mechanism connects (via the yellow hose) to the button or handle. Other reviewers mentioned that a kink in the connection hose causes the toilet to not flush properly.

After the installation was complete we let the tank refill and tried a few test flushes. The button was not as responsive as we had hoped, and the full-flush always left the toilet running. After adjusting the pieces and trying to refit the silicone seal, we replaced the dual button with the handle.

Dual Flush HandleWe positioned the handle vertically, again to cue our guests that something is different about this toilet. We’ve been using the toilet like this for the past few weeks, and I have no complaints. The water level in the bowl is less than before, and we already had “low flow” toilets. There hasn’t been any clogs or issues with the half or full flushes. I think that the piston mechanism is making the toilet work better than before. Jeremy is still unhappy that the button did not work. The button’s malfunction may be because everything is too cramped in the tank (causing the hose to kink). This conversion kit works with a lot of the preexisting components of the toilet. There is another kit that replaces all the parts of the tank, and may make more room for the button mechanism.

During installation we filled and empty the tank several times, and there were a lot of test flushes – so, we don’t expect to see any water savings until our next bill cycle. Since this toilet is using less water, we’ve been prioritizing its use. Perhaps if there are noticeable savings we will convert our other two toilets.

Anyone else have experience with dual-flush conversions? Did you just decide to buy a new toilet instead?