Niagara Toilets

Niagara Conservation (Fort Worth, Texas, founded 1979) is not a generalist toilet brand. It's a water-conservation specialist whose entire product line was engineered around one question: how do you push residential toilet flush volume below the federal 1.6 GPF maximum without sacrificing flush performance? The answer to that question — vacuum-assist trapway plus optimized siphonic geometry — built a brand that owns the ultra-low-flow segment of the US market.

The Niagara argument for ultra-low-flow

The federal toilet floor is 1.6 GPF. EPA WaterSense is 1.28 GPF. Niagara's flagship — the Stealth Sabre — flushes at 0.8 GPF. That's half the federal maximum and 38% less water than the WaterSense voluntary spec. Over a 5-year period, a two-person household using a Stealth Sabre saves roughly 23,000 gallons of water compared to a standard 1.6 GPF gravity toilet — and roughly 7,500 gallons compared to a 1.28 GPF model.

The engineering trick: a vacuum-assist trapway. As water exits the tank, it creates a partial vacuum behind it in the trapway, accelerating waste through. The result is flush velocity comparable to a pressure-assist toilet without the air-compression vessel and at a fraction of the noise. MaP scores on the Stealth Sabre routinely test at 800+ grams — solid performance at half the water volume.

The Niagara product line

• Stealth Sabre ($280–$340) — UPC C22.303.01. The flagship. 0.8 GPF gravity-assisted vacuum trapway, comfort height, elongated. Available in white, biscuit, and bone. EPA WaterSense Most Efficient list every year since 2014. Rebate-eligible everywhere rebates exist.
• Stealth (original) ($240–$280) — UPC C11.301.01. Same flush technology as the Sabre, slightly older bowl geometry, round-front available. The original 0.8 GPF design from 2007.
• Liberty ($170–$220) — UPC C11.101.01 R. 1.28 GPF (not ultra-low — meets WaterSense). The value-tier Niagara for shoppers who want the brand DNA at a Cadet/Cimarron price point.
• Phantom ($250) — 1.6 GPF traditional model. The non-water-saving Niagara — exists primarily for landlord rebuilds in rental properties where the rebate isn't a factor.
• Steaful ($180) — 1.28 GPF entry tier. Roughly comparable to a Cadet 3.

The rebate math (why Niagara is often the cheapest toilet to own)

A Niagara Stealth Sabre retails for ~$300. In rebate-active utilities — and this is the key — the rebate often runs $100–$200 per fixture. Net out-of-pocket can drop to $100–$200. Over 5 years, the water-bill savings on a two-person household typically run $40–$120/year vs a 1.28 GPF toilet (depending on local water rates).

Active rebate examples (verify with your specific utility — these change annually):

• LADWP (Los Angeles): $100 for sub-1.0 GPF toilets, $40 for 1.28 GPF
• Austin Water: $50–$100 per fixture, capped at 2 per household per year
• SRP (Salt River Project, AZ): up to $200 for ultra-low-flow replacement
• San Antonio Water System: $100 per replacement of pre-1992 toilets
• EBMUD (East Bay Municipal Utility District, CA): $100 per fixture for direct WaterSense

What you give up with ultra-low-flow

• Flushing some specific paper loads. Very heavy paper users (small children, certain medical conditions) occasionally double-flush a 0.8 GPF model where a 1.28 GPF would clear single. Honest disclosure: most households never notice, some do.
• Trapway flow tolerance. A 0.8 GPF flush is less forgiving of partial obstructions in the drain line. Houses with old, root-intruded sewer lines may need maintenance more often.
• Brand cachet. Niagara doesn't have the brand-recognition cachet of Kohler or TOTO. Doesn't matter for performance; matters if you're selling the house.

Where Niagara fits

• Drought-area residential — California, Arizona, Nevada, New Mexico, parts of Texas
• Anywhere with a rebate active — the rebate often pays for the toilet entirely
• LEED / green-building certified construction — Niagara Stealth qualifies for water-credit points
• Public-utility-funded multi-family retrofits — bulk Niagara purchases are the default in these programs

Warranty

5 years on tank trim, lifetime on porcelain, 5-year warranty on the vacuum-assist trapway mechanism. Parts are available direct from Niagara Conservation (their customer service ships flapper kits, fill valves, and trip levers within a week to any US address) — but not at Home Depot or Lowes. Plan for a one-week lead time if you ever need a service part.