Toilet Tank and Bowl, 2 piece, ADA, Elongated, White, 1.28 Gallons per Flush

Gerber Viper® Two-Piece Elongated Toilet – 1.28 GPF, ErgoHeight™, 12" Rough-In – Model GVP31518

The Gerber Viper® GVP31518 is a high-efficiency, two-piece toilet designed for commercial and residential applications requiring ADA-compliant bowl height and water-saving performance. Rated at 1.28 gallons per flush, this model meets EPA WaterSense® standards while maintaining effective bowl evacuation and consistent flushing reliability.

Equipped with a 3-inch flush valve and dual-fed siphon jets, the GVP31518 delivers fast and thorough flushing action. The ErgoHeight™ elongated bowl provides a rim height of 16-1/2", supporting universal access installations. This unit also includes a Fluidmaster® 400A fill valve and corrosion-resistant brass tank-to-bowl hardware for dependable long-term performance.

Key Features

• Flush Volume: 1.28 gallons per flush (4.8 liters per flush)
• Flush Valve: 3" valve paired with dual-fed siphon jets for optimized performance
• Bowl Height: 16-1/2" (ADA compliant when installed with appropriate seat)
• Bowl Type: Elongated ErgoHeight™ for enhanced comfort
• Trapway: 2", fully glazed for improved waste removal and clog resistance
• Fill Valve: Fluidmaster® 400A for quiet, reliable tank refill
• Installation: 12" rough-in, floor-mounted two-piece configuration
• Mounting Hardware: Includes non-corrosive brass tank-to-bowl bolts and multi-point connections

Technical Specifications

• Model: GVP31518
• Configuration: Two-piece toilet
• Water Efficiency: WaterSense® certified
• Compliance: ADA compliant bowl height (with correct seat)
• Warranty: 5-year limited on internal components, lifetime on vitreous china

Installation Notes

This model is designed for standard 12-inch rough-in applications and features a straightforward installation process. It uses a double nut, multi-point mounting system for tank alignment and sealing. To ensure proper performance and compliance with local codes, installation should be performed by a qualified plumber. Leveling, flange sealing, and water connection must be verified prior to commissioning.

Use Case and Application

Recommended for commercial tenant improvement, light institutional, and residential new construction or retrofit jobs requiring a reliable, ADA-compliant toilet system with efficient flushing. The GVP31518 is engineered for low-maintenance performance and is well-suited for settings where water conservation and code compliance are key project requirements.