Toilet Tank and Bowl, 2 piece, Round Front, Biscuit, 1.28 Gallons per Flush

Gerber Viper® 1.28 GPF Two-Piece Round Front Toilet – Model GWS3150009

The Gerber Viper® GWS3150009 is a high-efficiency, two-piece round front toilet designed to deliver consistent flushing power while maintaining water conservation standards. Rated at 1.28 gallons per flush, it meets EPA WaterSense® criteria, making it suitable for residential installations focused on performance and code compliance. This model features a 10-inch rough-in for space-constrained layouts and comes in a biscuit finish.

Product Highlights

• Flush Volume: 1.28 GPF – helps reduce water usage while maintaining performance.
• Flush Mechanism: 3-inch flush valve paired with a dual-fed siphon jet for full-bowl rinsing and solid waste removal.
• Trapway: 2-inch fully glazed design supports effective evacuation and minimizes clog potential.
• Fill Valve: Pre-installed Fluidmaster® 400A for reliable and quiet tank refill operation.
• Component Durability: Corrosion-resistant flapper and non-corrosive brass tank-to-bowl hardware included.

Key Specifications

• Model Number: GWS3150009
• Toilet Type: Two-piece, round front
• Flush Rate: 1.28 gallons per flush (4.8 Lpf)
• Rough-In: 10 inches
• Bowl Height: Standard height (non-ADA)
• Finish: Biscuit
• Certification: WaterSense® Certified

Installation Notes

Designed for standard floor-mounted installations, this model features a multi-point tank-to-bowl mounting system with reinforced brass bolts for secure alignment. While installation is straightforward for professionals, proper sealing and code-compliant connections are essential. A licensed plumber is recommended for best results in retrofit or new construction applications.

Contractor-Focused Considerations

• Use Case: Suitable for residential remodels, multi-family units, or projects requiring a 10" rough-in layout.
• Maintenance: Factory-installed standard fill and flush components simplify future servicing and part replacement.
• Design Compatibility: Compact round-front bowl supports tight bathroom clearances without compromising function.