Walk into any airport, stadium, or office tower in the United States, and the toilets you encounter almost certainly carry one of three names: Sloan, Zurn, or Gerber. These aren’t household brands the way Kohler or Toto are, and most consumers couldn’t pick their logos out of a lineup. But in commercial plumbing they’re the established standard, and the reasons are almost entirely about engineering, supply chains, and the boring economics of replacement parts.
The result is an oligopoly that has held remarkably steady for decades, even as residential plumbing has fragmented into hundreds of brands.
What commercial toilets actually have to do
A residential toilet flushes maybe 10 times a day. A commercial toilet in a busy stadium flushes 10 times an hour, every hour, for 12 hours, on a game day, for 20 years. The fixture has to survive that volume without leaking, clogging, breaking off the wall, or being destroyed by people who treat it badly. That’s why commercial toilets typically use flushometer valves rather than tanks — there’s no reservoir to refill, just a high-pressure pipe and a metering valve that delivers a precise flush in seconds. Flushometers are simpler, faster, and far more durable than tank-fill mechanisms. They’re also expensive to design well, which limits the field to companies with serious manufacturing capability.
Why these three
Sloan, founded in 1906, essentially invented the modern flushometer and still leads in market share. Their Royal and Regal valve lines are the industry workhorses, and their parts are stocked by every commercial plumbing supplier in North America. Zurn, founded in 1900, competes on a similar level and has grown through acquisitions in adjacent commercial fittings, drains, and water-management systems. Gerber, owned by Globe Union, fills the budget-conscious tier and dominates in mid-market projects where buyers want commercial durability without paying Sloan premiums. Toto and American Standard make commercial fixtures too, but their commercial divisions are smaller and their replacement-parts networks thinner. In commercial plumbing, parts availability isn’t a tiebreaker — it’s the entire game.
The replacement-parts moat
Here’s the structural reason these three brands keep winning: a commercial property manager doesn’t choose a toilet for a building; they choose a toilet they can fix forever. When a Sloan valve fails in 2026, the plumber needs a Sloan rebuild kit on the truck or available within 24 hours. That logistics network — distributors, training, certified parts — takes generations to build. A new entrant with a better fixture still loses because no one wants a fleet of orphan toilets in a 40-story building. This is the same dynamic that protects Otis and Schindler in elevators, and Caterpillar in construction equipment. The product matters, but the parts ecosystem matters more.
Bottom line
Commercial toilets aren’t glamorous, but they’re a case study in how durable industrial markets actually work. Sloan, Zurn, and Gerber don’t dominate because they spend on advertising — they dominate because their products survive abuse, their parts are everywhere, and the people specifying them have careers that depend on not picking the wrong brand. That kind of moat is hard to dig and harder to fill in.
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