Niagara Sabre 1.28 GPF Toilet C22.303.01: Full Guide

What Is the Niagara Sabre 1.28 GPF Toilet C22.303.01?

The C22.303.01 is the right-handle combo version of Niagara’s Sabre line, built around an elongated bowl set at ADA-compliant comfort height. It’s designed for both residential and commercial installations where accessibility height and water efficiency both matter.

This model uses a 12-inch rough-in, the most common distance between the wall and the drain flange in North American plumbing, which makes it a straightforward swap in most existing bathrooms without additional plumbing modifications. The “C22.303.01” designation specifically identifies this as the right-handle flush lever version of the combo package, distinguishing it from the mirrored left-handle option Niagara also sells.

Choosing the correct handle orientation matters more than it might seem, especially in tight bathroom layouts where a flush lever on the wrong side can end up awkwardly close to a wall, cabinet, or grab bar.

Full Specification Table: Niagara Sabre 1.28 GPF Toilet C22.303.01

Here’s a complete breakdown of the toilet’s core specifications, pulled from Niagara’s own product documentation.

Keep this table on hand when comparing the C22.303.01 against similar toilets from other efficiency-focused brands.

Understanding the 1.28 GPF Flush Rate

A 1.28 gallons-per-flush rating places this toilet in the high-efficiency category, using noticeably less water than the older 1.6 GPF standard that was common in North American plumbing for decades. Over a household’s typical annual usage, that difference adds up to meaningful water savings without requiring a lifestyle change.

This flush rate also qualifies the C22.303.01 for WaterSense certification, a EPA-backed program confirming both water efficiency and flush performance meet a recognized standard. Some regions and utility rebate programs specifically require WaterSense certification to qualify for toilet replacement incentives, so this certification can translate into direct savings on the purchase itself.

Lower flush volume alone doesn’t guarantee a strong flush, which is where the toilet’s specific flush technology becomes the more important factor.

What Is Stealth Technology, and Why Does It Matter?

Niagara’s patented Stealth Technology is the core feature separating the Sabre line from a generic low-flow toilet. The system is engineered to deliver a genuinely quiet flush while still generating enough force to fully clear the bowl on the first attempt, addressing the most common complaint about low-flow toilets: weak, incomplete flushes that require a second flush and negate the water savings.

This matters practically for both residential bathrooms near bedrooms, where a loud flush at night is a real annoyance, and commercial or multi-family settings where noise carries between units. A flush system that performs reliably without needing a repeat flush is also the difference between a toilet that actually saves water in practice and one that only saves water on paper.

Choosing a toilet based on flush rate alone, without checking for a comparable flush technology claim, is one of the most common mistakes buyers make when shopping for efficient models.

ADA Height and Elongated Bowl: Who This Model Suits

The C22.303.01 sits at ADA-compliant comfort height, generally a couple of inches taller than a standard-height toilet. This height difference makes sitting down and standing up noticeably easier for taller adults, older adults, and anyone with mobility or joint concerns.

The elongated bowl shape adds additional seating comfort compared to a round bowl, though it does require slightly more clearance depth in your bathroom layout. Before ordering, measure your existing bathroom’s available space in front of the toilet to confirm an elongated bowl fits comfortably, since this shape typically extends two to three inches further than a round bowl of the same brand and line.

Combining ADA height with an elongated bowl makes this model a common choice for accessible bathroom remodels, assisted living facilities, and any household prioritizing comfort alongside water efficiency.

Right-Handle vs Left-Handle: Choosing the Correct Combo

The C22.303.01 model specifically refers to the right-handle flush lever version. Niagara also offers this same toilet as the C22.302.01, which places the flush lever on the left side instead.

Confirm your bathroom’s layout before ordering, since a flush lever positioned too close to a wall, vanity, or grab bar can make daily use awkward regardless of how well the toilet otherwise performs.

Installation Considerations for the C22.303.01

A 12-inch rough-in is the most common measurement in North American homes, which means this toilet typically installs as a direct replacement without modifying existing plumbing. Confirming your actual rough-in measurement before ordering is still worth doing, since older homes occasionally use a 10-inch or 14-inch rough-in instead.

Because this is a combo package rather than a one-piece toilet, installation involves connecting the separately shipped tank and bowl components before setting the unit in place. Following the included installation instructions closely during this step helps avoid a leak at the tank-to-bowl seal, which is the most common installation issue reported with two-piece toilet combos generally.

Budgeting time for a wax ring replacement and floor bolt installation as part of the swap is standard practice regardless of which specific toilet model you’re installing.

Maintenance Tips for Long-Term Performance

A well-maintained low-flow toilet keeps its efficient flush performance for years without issues. A few simple habits protect that performance over the toilet’s lifespan.

• Check the flapper and fill valve annually for wear, since a worn flapper is the most common cause of a running toilet
• Avoid flushing wipes, paper towels, or other non-dissolving materials, which can clog the smaller water passages in high-efficiency toilets
• Clean the bowl regularly with a non-abrasive cleaner to prevent mineral buildup from affecting flush performance over time
• Test the flush periodically to confirm it’s still clearing the bowl fully on the first attempt
• Address any running or weak flush symptoms promptly, since a small issue left unaddressed can affect water bills significantly over time

Following this routine helps the C22.303.01 maintain its rated efficiency and flush performance well beyond a typical warranty period.

Is the Niagara Sabre 1.28 GPF Toilet C22.303.01 Worth Buying?

For anyone replacing an older, less efficient toilet or completing an accessible bathroom remodel, this model delivers a strong combination of water savings, flush reliability, and ADA-compliant comfort height. The WaterSense certification also opens the door to potential utility rebates in many regions, which can offset part of the purchase cost.

The main consideration is confirming the correct handle orientation and bowl clearance for your specific bathroom layout before ordering, since the elongated bowl and right-handle configuration won’t suit every space equally well. Double-checking your rough-in measurement is a similarly quick step that prevents a returned or ill-fitting order.

Compare the spec table above against your bathroom’s measurements and layout, then order the C22.303.01 through an authorized Niagara dealer to confirm current availability and pricing.

Frequently Asked Questions

What does the C22.303.01 model number mean for this toilet?

Short answer: C22.303.01 identifies the right-handle flush lever combo version of the Niagara Sabre 1.28 GPF elongated, ADA-height toilet.

Niagara also sells a mirrored left-handle version under the model number C22.302.01. Confirming which handle orientation fits your bathroom layout before ordering avoids ending up with a flush lever positioned awkwardly close to a wall or fixture.

How much water does the Niagara Sabre 1.28 GPF toilet use per flush?

Short answer: It uses 1.28 gallons per flush, which qualifies it for WaterSense certification and places it well below the older 1.6 GPF standard.

This flush rate typically translates into meaningful water savings over a year of normal household use. Some utility rebate programs specifically require WaterSense certification, so this rating can also translate into direct savings on the purchase price.

What is Stealth Technology in the Niagara Sabre line?

Short answer: Stealth Technology is Niagara’s patented flush system designed to deliver a quiet flush while still generating enough force to fully clear the bowl on the first attempt.

This addresses the most common complaint about low-flow toilets, which is a weak flush that requires a second attempt and cancels out the water savings. It’s a key reason the Sabre line performs differently from generic low-flow toilets at a similar price point.

Is the Niagara Sabre 1.28 GPF toilet ADA compliant?

Short answer: Yes, the C22.303.01 sits at ADA-compliant comfort height, which is a couple of inches taller than a standard-height toilet.

This height makes sitting and standing noticeably easier for taller adults, older adults, and anyone with mobility concerns. It’s a common choice for accessible bathroom remodels and assisted living facility installations specifically because of this height feature.

What rough-in size does the C22.303.01 require?

Short answer: It uses a standard 12-inch rough-in, the most common measurement in North American homes, which typically allows direct replacement of an existing toilet.

Measuring your actual rough-in distance before ordering is still worth doing, since some older homes use a 10-inch or 14-inch rough-in instead. Installing a toilet with the wrong rough-in measurement can require additional plumbing modifications.

Does the Niagara Sabre 1.28 GPF toilet come as a one-piece or two-piece unit?

Short answer: It ships as a two-piece combo package, with the tank and bowl shipped and installed as separate components rather than one fused unit.

Following the included installation instructions carefully during setup helps prevent a leak at the tank-to-bowl seal, which is the most common issue reported with two-piece toilet installations generally. Budgeting time for a wax ring and floor bolt installation is standard practice as part of the swap.

About This Guide

This guide was compiled using Niagara Conservation’s official product specifications and authorized retailer listings, cross-checked for accuracy before publication. It reflects specifications current as of 2026.

Sources referenced:

• Niagara Conservation, Official SABRE 1.28 GPF Elongated ADA Height Toilet Product Page
• Ferguson, Niagara Sabre 1.28 GPF Toilet Tank Product Listing
• Winthrop Supply, Niagara C22.303.01 Product Specifications
• Home Depot, Niagara Sabre Toilet Product Listings and Specifications

Ready to upgrade your bathroom? Measure your rough-in and available bowl clearance, confirm the right-handle orientation fits your layout, and order the C22.303.01 through an authorized Niagara dealer.