The Stealth Toilet Uses Only 0.8 Gallons Per Flush

In the U.S., toilets account for 30% of indoor water use, but this is mostly due to their inefficient designs. So I was pleased to find the Stealth Ultra-High-Efficiency Toilet toilet by Niagara. This is probably the most water efficient flush toilet available for residential use. The Stealth (great name by the way) uses only 0.8 gallons per flush (GPF). This is much less than the average toilet, which uses around 2.5 gallons per flush. It’s also 37% less water than a “high-efficiency” toilet (those certified by EPA WaterSense).

The Stealth achieves this low rate because of its innovative hydraulic design. By harnessing the energy of water filling the tank, Stealth uses an air transfer system to pressurize the bowl’s trapway (the exit pipe). It creates swift, powerful flush using 0.8 gallons. Niagara, the manufacturer of the Stealth claims that the Stealth also the quietest toilet available.

I’m had two of these toilets installed in my house — and they flush better than most toilets I’ve encountered. They are also very quiet. Of course I’d prefer to have a composting squat toilet with bidet functionality.

Here’s a diagram of the toilet’s inner workings (click enlarge):

The Stealth Ultra-High-Efficiency Toilet is available on Amazon for $211.

Here’s the Stealth home page.

Comments

  1. ToiletGuy says

    You say that the average toilet in the US uses 2.5 gallons per flush; that may be true of existing toilets, but it’s irresponsible reporting (in the interest of garnering interest in selling toilets) to neglect to point out that since 1994 (nearly twenty years) the federal mandate has been just 1.6 gallons per flush.
    0.8 gallons is certainly impressive, but at best it’s just a 50% reduction from the next toilet on the shelf at BigBox Store, Inc, rather than the larger savings that you suggest.
    Also, when did your grammar get so sloppy?!?!

  2. web master says

    It seems like you are just trolling, but:

    The article states that the average toilet in the U.S. uses around 2.5 gallons per flush. This is a fact.

    It’s also a fact that the Stealth toilet uses 37% less water than a high-efficiency toilet as certified by WaterSense, as stated in the article.

    I’m sorry if you were confused, but there were no misleading statements in the article.

  3. ToiletGuy says

    Definitely not trolling; go read the ANSI specs. The EPA mandates that new toilets sold in the 50 states to consume 1.6 gpf or less, except urinals, which are limited to 1.0 gpf.
    There’s no confusion on my part, only facts.
    The stealth toilet does indeed use less water, but having viewed YouTube video footage taken at Niagara’s facitily wherein the toilet didn’t flush all of the test material, I’ll stick with my dual flush H2Option by American Standard.

    • web master says

      Yes, are still confused. I don’t need to read any ANSI specs, because I never referred to that information in the article. You implied that my article was misleading — it was not.

  4. ToiletGuy says

    We’ll have to agree to disagree.
    Stating that the average toilet uses 2.5 gallons per flush is misleading.
    Adieu, metaefficient.

    • Justin says

      If I said the average toilet in the U.S. uses 1.6 gallons, that would be inaccurate. The average toilet in the U.S. uses 2.5 gallons. This is because there is a mixture of older toilets that use 3-8 gallons per flush, and newer toilets that use 1.6 gallons or less.

  5. EfficiencySeeker says

    Another interesting article from MetaEfficient. Anyways, I was curious to know if you had any experience with Toto toilets. They are engineered in Japan but made in the U.S.A. The are supposed to be THE BEST, bar none. I never used one but read nothing but praises for them.

  6. john says

    Finally something new; I remember when this was a busy site… I find more on my own time but stumbled into the old bookmark.

    When I was looking at these at least a year ago, I found some comments about them flushing too strongly and splashing you-know-what all over the place. That made me quite concerned. Something to think about and possibly investigate (by crowd sourcing.) My theory was that the people with problems had HIGH water pressure and it is designed for a typical pressure level; it’s design is mostly conventional pressure tank – the clever part is their empty trap. I am for pressure tanks even though they don’t save water– they cut down on the reflushing so it is hard to measure the savings they likely have.

    How about an article on home urinals? half the people are men and half flush doesn’t really work. Septic tanks is another one; I’ve always planned that my next house will be off city water/sewer. For them, you need some water so saving flush water is less of an issue (rain or well water, it ends up back in the ground.)

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