"Automatic toilets do in fact save water," says Ryan Miner, owner of Bay Area-based Miner Plumbing. "They save water because people have a tendency to think that if you hold the handle down longer, it will have more 'flushing power'; well, it's more water, but it certainly isn't more flushing power." Miner says that while older models weren't up to task, newer models, particularly from the Japanese brand TOTO, are in fact eco-friendlier.
And although some have blamed years of phantom flushing from older models on poor installation and maintenance, experts in the field say substandard technology and poor training were more likely the culprit. In 2015, Mark Malatesta, a product compliance engineer at toilet maker American Standard, told the Guardian, "It's usually building maintenance or plumbers installing them, and a lot of times there's just a lack of knowledge about how the products work," he said. "Once installed properly, you should be good to go." (Forgive us for that.)
But Miner says he and his colleagues weren't prepared to tackle the automatic-flush models when they first emerged. "Plumbers weren't given a heads-up on the new technology," he says. "This product was slapped on our knees, and we were left to figure it out and make it work. That being said, it's really tough to mess it up and make it so that the toilet is phantom flushing. The blame is really on the product. It was new, and it was faulty." Miner says installation should always be taken care of by a professional, although newer automatic models are a lot more user-friendly.
Koeller agrees that phantom flushing shouldn't be pinned on plumbers. "For the skilled plumber, I would say it's not tricky," he says of installation. "That is not the only reason for phantom flushes. Ignored maintenance, deferred maintenance or poor maintenance could all lead to faulty performance of the flush sensor used to trigger a flush. In addition, many of these so-called 'automatic' flush toilets are installed in toilet rooms subject to abuse by the public or others. High-usage toilets need to be monitored for performance by the maintenance personnel and fixed when needed; this does not always occur in many installations."
Miner also earlier alluded to another reason automatic-flushing toilets may no longer be the major water wasters they once were: Brands like TOTO are partnering with the EPA to create eco-friendly products that are performance-tested and validated by various agencies to meet the EPA's gold standard. High-efficiency toilets that meet the EPA's stringent guidelines get a WaterSense label, letting customers know they're purchasing a product that's expert-approved and much less wasteful. WaterSense flush at 1.28 gpf (4.84 lpf), which is 20 percent less water than the federal standard, and also have a minimum flush volume of 1.0 gpf (3.78 lpf) to guarantee plumbing systems have adequate flow for proper functioning.
And the EPA says there's more to save than just water when purchasing a WaterSense product: They estimate that a 10-story office building with 1,000 occupants could save 1.2 million gallons (4.54 million liters) of water and more than $10,000 in water costs by replacing old automatic-flush toilets with WaterSense labeled models. "If commercial facilities nationwide replaced all of their older, inefficient flushometer-valve toilets with WaterSense labeled models," the agency writes in a statement, "we could save nearly 39 billion gallons (148 billion liters) of water per year. That's equivalent to nearly one full day's flow of water over Niagara Falls!"
So if you're planning to purchase your own automatic-flushing toilet at home, be sure you look for the most up-to-date products out there. And if you're walking into an out-of-date public restroom ... beware of phantoms.