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Read the guideReal specs, MaP flush scores and aggregated owner feedback — no paid placements.
Review updated June 2026.
The Glacier Bay 2-Piece Power Flush Toilet delivers a surprisingly strong 800-gram MaP flush using just 1.1 gallons per flush, making it one of the most efficient budget options available. It is a Home Depot house brand that prioritizes raw flushing power over premium features like soft-close seats or glaze coatings. If you need a reliable, no-frills toilet that clears waste effectively without breaking your water bill, this is a strong contender. However, the short 1-year warranty and standard 16-inch height may not suit everyone.
| Spec | Value |
|---|---|
| MaP Score | 800g |
| GPF | 1.1 gallons per flush |
| Flush System | Power flush gravity |
| Trapway Size | 2.25-inch |
| Height | Standard (16 in) |
| Rough-In | 12-inch |
| Seat Included | Yes |
| WaterSense | Yes |
| Warranty | 1 year limited |
The MaP (Maximum Performance) score is the industry standard for measuring toilet flush performance. An 800-gram score means this toilet can handle heavy waste loads that many standard toilets struggle with. To put this in perspective, most residential toilets with 1.28 GPF achieve MaP scores between 500g and 700g. The Glacier Bay's 800g score is exceptional for a 1.1 GPF model.
The power flush gravity system uses a larger trapway (2.25 inches) compared to standard 2-inch trapways, which reduces clogging risk. The combination of high-velocity water release and wider passageway creates a strong siphoning action that pulls waste through efficiently. Owners consistently report that this toilet rarely requires a second flush, even after large meals or gatherings.
One important note: the power flush system is louder than a standard gravity flush. The water rushes through the bowl with noticeable force, which some users find startling during nighttime use. However, the trade-off is reliable single-flush performance that eliminates the need for plunging.
The 800g MaP score at 1.1 GPF is genuinely impressive for a budget toilet. Most toilets in this price range score 500-600g. The power flush gravity system uses the water's velocity rather than pressure-assist technology, so it avoids the loud compressor noise of commercial-grade toilets while still delivering heavy waste clearance.
WaterSense certification from the EPA ensures the toilet meets strict criteria for both water conservation and performance. To earn this label, a toilet must flush at least 350 grams of waste per flush in independent testing. The Glacier Bay exceeds this requirement by more than double with its 800g MaP score.
At 1.1 GPF, this toilet saves approximately 0.5 gallons per flush compared to a standard 1.6 GPF toilet. For a family of four flushing five times per day, that adds up to 2.5 gallons saved daily, or over 900 gallons per year. Over the toilet's lifespan, the water savings can offset the purchase price multiple times.
It is worth noting that some ultra-high-efficiency toilets use 0.8 GPF or dual-flush systems, but they often sacrifice flush power. The Glacier Bay strikes an excellent balance between water conservation and reliable waste clearance. The 1.1 GPF single-flush design is simpler than dual-flush mechanisms and less prone to mechanical failure.
WaterSense certification at 1.1 GPF with an 800g MaP score is rare. Most WaterSense toilets use 1.28 GPF and score 500-700g. The Glacier Bay achieves better performance with less water, making it a standout choice for eco-conscious buyers who refuse to compromise on flush power.
Positive themes from owners include:
Negative themes include:
The owner feedback pattern is clear: this toilet excels at its core function of flushing waste efficiently but cuts corners on comfort and noise. If you prioritize flush power over a quiet experience and don't mind upgrading the seat, the reviews suggest this is a solid choice. The loud flush is the most frequently cited reason for returns.
The American Standard Cadet 3 is the most direct competitor. Both toilets achieve an 800g MaP score, but the Cadet 3 uses 1.28 GPF versus the Glacier Bay's 1.1 GPF. The Cadet 3 features a standard gravity flush that is significantly quieter than the Glacier Bay's power flush system. The Cadet 3 also comes with a 5-year limited warranty and a soft-close seat on some models.
Another competitor is the Toto Drake (1.28 GPF, 800g MaP, ~$300). The Toto Drake is known for its quiet, efficient flush and superior build quality. It features CEFIONTECT glaze that prevents waste from sticking. The Glacier Bay lacks this feature. The Toto Drake also has a 5-year warranty and a more refined design. However, it costs significantly more.
For budget-conscious buyers, the Glacier Bay offers the best value. You get 800g flush power at 1.1 GPF for a fraction of the cost of premium brands. The trade-offs are noise, warranty length, and basic components. If you plan to keep the toilet for 10+ years, the longer warranty and better seat of the Cadet 3 may justify the higher price.
The Glacier Bay's 1.1 GPF with 800g MaP is unmatched in its price tier. The American Standard Cadet 3 is a better all-around product with quieter operation and longer warranty, but it uses more water. For buyers on a tight budget who want maximum flush power and water savings, the Glacier Bay is the clear winner. For those willing to spend more for a quieter, more refined experience, the Cadet 3 is worth the premium.
Yes, a standard plastic seat is included with the toilet. It does not have soft-close hinges, so the lid may slam if dropped. Many owners choose to upgrade to an aftermarket soft-close seat.
Yes, the power flush gravity system produces a noticeably louder flush than standard gravity toilets. Owners describe it as similar to a commercial toilet. The noise comes from the rapid water release and siphoning action.
The MaP score is 800 grams, meaning it can clear 800 grams of solid waste in a single flush. This is an excellent score that exceeds most residential toilets.
It uses 1.1 gallons per flush (GPF). This is less than the federal standard of 1.6 GPF and qualifies it for WaterSense certification.
Yes, it is WaterSense certified by the EPA, meaning it meets strict criteria for water efficiency and performance. It uses at least 20% less water than standard 1.6 GPF toilets.
The rough-in is 12 inches, which is the standard size for most residential bathrooms. Measure from the wall to the center of the floor flange to confirm compatibility.
No, the seat height is 16 inches, which is standard height. Comfort-height toilets typically measure 17 to 19 inches. This model may be less comfortable for taller individuals or those with mobility issues.
It comes with a 1-year limited warranty. This is shorter than many competitors that offer 5-year or lifetime warranties. The warranty covers defects in materials and workmanship.
No, the 2.25-inch trapway and powerful 800g flush make it highly resistant to clogs. Owners report rarely needing a plunger, even with heavy use.
Yes, the two-piece design is straightforward for DIY installation. Most owners report completing the job in under an hour with basic plumbing tools. The included instructions are clear.
No, it uses a single-flush system with a consistent 1.1 GPF. There is no liquid/solid selector. The single-flush design is simpler and less prone to mechanical issues than dual-flush mechanisms.
Toto toilets like the Drake offer similar 800g flush performance with quieter operation and longer warranties. However, they cost significantly more. The Glacier Bay provides comparable flush power at a fraction of the price, with trade-offs in noise and build quality.
The Glacier Bay 2-Piece Power Flush Toilet offers exceptional 800g flush power at just 1.1 GPF, making it a top choice for budget-conscious buyers who prioritize performance. The loud flush and basic seat are fair trade-offs for the water savings and clog-free operation. A solid value pick.
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We do not run physical lab tests. Rankings are built from published, verifiable data and real owner feedback, never paid placement.
Researched by BFT Editorial Team · Last updated March 26, 2026 · Our review method
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