24" Rough-In Two-Piece Elongated ErgoHeight™ Toilet, 1.28 gpf, White

Gerber Viper® 1.28 GPF Two-Piece Elongated Toilet – 14" Rough-In, ErgoHeight™ – Model GWS31524

The Gerber GWS31524 Viper® toilet is a two-piece elongated unit engineered for 14" rough-in installations where accessibility, durability, and water conservation are required. Featuring ErgoHeight™ bowl dimensions and a 1.28 gallon per flush (GPF) rating, this model meets both performance and code-driven project demands, including EPA WaterSense® criteria.

This model utilizes a 3" flush valve combined with a large dual-fed siphon jet to deliver consistent flushing efficiency and bowl evacuation, reducing the risk of clogging in high-use applications. Constructed from vitreous china and equipped with brass tank-to-bowl hardware, it offers long-term reliability in residential or commercial use.

Key Specifications

• Flush Volume: 1.28 gallons per flush (WaterSense® certified)
• Flush Mechanism: 3" flush valve with oversized dual-fed siphon jet
• Bowl Type: Elongated ErgoHeight™ – ADA compliant when installed with compliant seat
• Rough-In: 14 inches
• Trapway: 2" fully glazed
• Mounting: Floor, two-piece configuration
• Construction: Vitreous china with non-corrosive brass tank-to-bowl bolts
• Fill Valve: Fluidmaster® 400A
• Warranty: 15-year limited on vitreous china; 5 years on internal components

Installation Details

The GWS31524 model is designed for fast-track installs and retrofit work where a 14" rough-in is required. The three-bolt tank configuration and rigid brass bolt system provide stability, while the included Fluidmaster® 400A fill valve ensures efficient tank refill with minimal noise. Professional installation is recommended to verify flange alignment, ensure proper sealing, and meet applicable code requirements.

Professional Applications

This toilet is a practical solution for residential remodels, assisted-living upgrades, and light commercial projects. The ErgoHeight™ design improves accessibility and user comfort, while the flush system minimizes maintenance callbacks. Compatible with Gerber tanks designed for 14" rough-in installations.

Included Performance Features

• High-Efficiency Flushing: Exceeds ANSI performance testing requirements for bulk waste removal
• ADA-Compliant Height: Bowl height supports universal access when properly installed with seat
• Corrosion-Resistant Components: Internal hardware selected for durability in varied water conditions
• Fully Glazed Trapway: Improves flow characteristics and reduces buildup