Gerber Plumbing offers 4 watersense certified toilets models in the lineup we track. This page is the Gerber Plumbing-specific cut of the broader EPA WaterSense Certified Toilets toilets category — same product class, narrowed to the Gerber Plumbing catalog only.
Gerber Plumbing Fixtures (Lincolnshire, Illinois — a subsidiary of Globe Union Industrial since 2007) has supplied US tract-builder bathrooms since 1932. Lines include Maxwell, Viper, Avalanche, Allerton, and Wicker Park. Gerber's niche is the entry-to-mid commercial spec range: 1.28 GPF or 1.6 GPF gravity toilets, ADA chair-height available throughout, and a parts supply chain that plumbers actually keep in their truck for flush-valve and fill-valve rebuilds.
For the complete Gerber Plumbing lineup across all sub-types and capacities, see the Gerber Plumbing Toilets hub.
If you're cross-shopping watersense certified toilets beyond Gerber Plumbing, the following brands also ship in this category:
EPA WaterSense is the federal voluntary water-efficiency certification program. A WaterSense-certified toilet uses 1.28 gallons per flush or less AND meets a minimum flush performance threshold (MaP score 350g+). Buying WaterSense-certified is the simplest way to ensure you're getting a real high-efficiency toilet, not just a label.
A 1.28 GPF toilet that won't reliably flush solid waste isn't actually water-saving — owners double-flush, defeating the savings. WaterSense certification requires the toilet to pass the MaP (Maximum Performance) test, which measures how much simulated solid waste the toilet clears in a single flush. The minimum threshold is 350g; most WaterSense-certified toilets test at 600–1,000g, well above the threshold.
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For the complete watersense certified buyer's guide (all brands, full comparison framework), see the EPA WaterSense Certified Toilets category hub.
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