12" Rough-In Two-Piece Elongated Toilet, 1.28 gpf, Bone

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

The Gerber GWS3151225 Viper® toilet is a two-piece, high-efficiency unit engineered for performance and durability in residential and light commercial settings. With a flush rate of 1.28 gallons per flush (GPF), this model is WaterSense® certified and designed to support water-saving compliance without compromising on waste removal power. Its elongated bowl and Comfort Height configuration enhance usability for a range of applications.

Key Performance Features

• High-Efficiency Flush: Operates at 1.28 GPF to meet EPA WaterSense® criteria, reducing overall water consumption.
• Flush Mechanism: Utilizes a 3" flush valve and dual-fed siphon jet for consistent bowl-clearing performance.
• Tank-to-Bowl Connection: Multi-point mounting system with non-corrosive brass bolts ensures stability and alignment.
• Quick Refill: Equipped with a Fluidmaster® 400A fill valve for reliable tank recharge and reduced refill time.
• Bowl Configuration: Elongated bowl for improved comfort and compliance with ADA height guidelines when installed correctly.

Technical Specifications

• Model Number: GWS3151225
• Flush Volume: 1.28 gallons per flush (4.8 liters)
• Bowl Shape: Elongated
• Rough-In: 12 inches
• Material: Vitreous china
• Trapway: 2" fully glazed
• Certification: WaterSense® certified
• Warranty: 15-year limited on components

Installation Considerations

Designed for standard floor-mounted installations, the GWS3151225 includes a three-bolt tank-to-bowl connection and right-hand chrome trip lever. Installation should follow local plumbing code requirements and be completed by a qualified professional to ensure optimal performance and leak-free operation. Compatible with standard wax rings and closet bolts (not included).

Professional Use and Application

Ideal for both residential upgrades and new construction, the Viper® 1.28 GPF elongated toilet offers a reliable solution for high-traffic environments. Its durable components and flush performance reduce callbacks, while the low water consumption supports LEED® and green building initiatives.