The Gerber Maxwell ADA toilet bowl (MX-21-928) delivers commercial-grade performance for contractors tackling healthcare facilities, public restrooms, and accessible residential projects. This ErgoHeight elongated bowl sits at 16.5 inches — proper ADA height that makes transfers easier without requiring special risers or modifications.
The 1,000-gram MaP (Maximum Performance) score tells the real story. That’s serious waste removal capacity — more than double what basic residential toilets manage. The 3-inch flush valve and dual-fed siphon jet system create the flushing power commercial installations demand.
ADA Compliance and Installation Flexibility
The MX-21-928 meets full ADA compliance standards with its 16.5-inch ErgoHeight design. Professional contractors praise this model specifically for healthcare facilities and public spaces where accessibility isn’t optional.
Standard 12-inch rough-in fits existing plumbing layouts. The bowl weighs 51-53 pounds and uses a floor-mounted configuration with 2-bolt or 3-bolt tank mounting patterns. Tool-free tank-to-bowl assembly saves installation time when paired with compatible tanks.
| Specification | Value |
|---|---|
| Bowl Height | 16.5 inches (ErgoHeight) |
| Rough-In | 12 inches |
| Bowl Weight | 51-53 lbs |
| Trapway | 2 inches (fully glazed) |
| Flush Valve | 3 inches |
| Water Surface | 7-3/8” x 8-7/8” |
Flushing Performance and Water Options
The 1,000-gram MaP score ranks among the highest in commercial toilets. The combination of a 3-inch flush valve, dual-fed siphon jet, and 2-inch fully glazed trapway eliminates clogging concerns in high-traffic installations.
Water efficiency varies by tank selection — pair with a 1.28 gpf tank for WaterSense certification or choose 1.6 gpf for maximum flushing power. Compatible tanks include the G0028990 (standard 1.28 gpf), G0028995 (1.28 gpf with Insuliner for condensation control), G0028994 (1.28 gpf with 14-inch tank), and G0028992 (1.28 gpf with right-hand lever).
The dual-flush compatibility means contractors can meet various water conservation requirements without changing bowl specifications. Montana healthcare facilities upgrading older fixtures appreciate this flexibility when balancing water savings against reliable performance.
Professional Installation Considerations
The bowl ships with color-matched bolt caps but requires separate purchase of wax ring, floor bolts, and toilet seat. Any standard elongated seat fits this bowl. Some contractors note parts availability as a consideration, though professional installers generally find these manageable.
The Limited Lifetime Warranty covers the vitreous china bowl, while tank components typically carry 1-5 year warranties depending on the specific kit. Certifications include cUPC listing and ASME A112.19.2 / CSA B45.1 compliance.
The non-porous glazed vitreous china surface simplifies maintenance — critical for healthcare settings where cleaning protocols demand surfaces that won’t harbor bacteria. The elongated bowl design provides comfort while maintaining the commercial-grade durability these installations require.
FAQ
What makes this toilet ADA compliant? The 16.5-inch ErgoHeight bowl meets ADA height requirements when properly installed. This height range (17-19 inches to the seat) enables easier transfers for users with mobility challenges.
Can this bowl work with dual-flush systems? Yes, the MX-21-928 is dual-flush compatible and works with both 1.28 gpf and 1.6 gpf tank options. Choose your tank based on local water conservation requirements and desired flushing performance.
What’s included with the bowl purchase? The package includes the vitreous china elongated toilet bowl and two color-matched bolt caps. You’ll need to purchase the wax ring, floor bolts, toilet seat, and tank separately.
How does the MaP score compare to residential toilets? At 1,000 grams, this toilet’s MaP score significantly exceeds typical residential models. Most home toilets test between 350-600 grams. This higher score translates to fewer clogs and callbacks in commercial settings.
Which facilities benefit most from this model? Healthcare facilities, assisted-living centers, and public restrooms represent the primary applications. Any project requiring ADA compliance and commercial-grade durability should consider this bowl.
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