Gerber Viper WS-21-518, ErgoHeight Two-Piece 12" Rough-In Toilet, Left-Hand Trip Lever, White, Elongated, 1.28 gpf, Seat Not Included

Gerber Viper® GWS21518 ErgoHeight™ Two-Piece Toilet – 1.28 gpf, 12" Rough-In

The Gerber GWS21518 Viper® ErgoHeight™ toilet offers efficient water usage and comfort-focused design for residential and light commercial applications. This two-piece elongated unit combines a WaterSense®-certified flush rate with ADA-compliant seating height and reliable gravity-fed performance.

Performance Features

• 1.28 gpf Efficiency: High-efficiency flush system helps reduce overall water consumption
• ErgoHeight™ Bowl: Chair-height seating improves comfort and accessibility
• Elongated Bowl Shape: Provides added user comfort compared to standard round-front models
• Gravity Flush System: Dual-fed siphon jet supports strong bowl evacuation and improved rinsing
• Vitreous China Construction: Durable finish resists stains and retains its appearance

Specifications

• Flush Rate: 1.28 gallons per flush (4.8 Lpf)
• Rough-In: 12 inches
• Bowl Height: ErgoHeight™ (approx. 17" rim height)
• Trip Lever Location: Left-hand
• Color: White
• Mounting Hardware: Brass tank-to-bowl bolts
• Fill Valve: Fluidmaster® 400A

Installation Considerations

The GWS21518 features a two-piece configuration suitable for standard floor-mount rough-ins. Installation requires proper alignment of tank-to-bowl connections and may benefit from a multipoint mounting system. Professional installation is advised to ensure compliance with plumbing code and performance expectations.

Contractor-Oriented Highlights

• ✅ WaterSense® Certified: Meets EPA efficiency standards without sacrificing flush quality
• ✅ ADA Height Compliant: When installed with the appropriate seat, meets ANSI accessibility requirements
• ✅ Glazed Trapway: Minimizes clogging potential and supports smoother flow
• ✅ Heavy-Duty Fill Valve: Delivers reliable tank refill cycle