12" Rough-In Two-Piece Elongated ErgoHeight™ Toilet, 1.28 gpf, Biscuit

Gerber Viper® ErgoHeight™ 1.28 gpf Two-Piece Elongated Toilet – GWS3151825

The Gerber GWS3151825 Viper® ErgoHeight™ elongated toilet is engineered for commercial-grade performance with user comfort in mind. Featuring a two-piece configuration with a 12" rough-in, this model delivers consistent flushing efficiency using only 1.28 gallons per flush. The ErgoHeight™ bowl meets ADA height guidelines, providing improved accessibility and comfort for most users.

Key Features

• Flush Volume: 1.28 gpf high-efficiency gravity flush system
• Flush Mechanism: 3" flush valve and dual-fed siphon jet improve bowl washdown and reduce the risk of clogs
• Comfort Height Bowl: ErgoHeight™ bowl offers 16-1/2" seating height (without seat), meeting ADA standards when paired with a compliant seat
• WaterSense® Certified: Complies with EPA WaterSense criteria for water conservation
• Mounting Hardware: Brass tank-to-bowl bolts and multipoint mounting for secure, corrosion-resistant installation

Technical Specifications

• Material: Vitreous china
• Bowl Type: Elongated
• Configuration: Two-piece
• Flush Rate: 1.28 gallons per flush (4.8 Lpf)
• Rough-In: 12 inches
• Height to Rim: 16-1/2 inches (ErgoHeight™)
• Certification: WaterSense®, ADA compliant when installed to code
• Warranty: 15-year limited on vitreous china components

Installation Notes

This toilet installs on a standard 12-inch rough-in and requires a floor-mounted connection. It is recommended that installation be performed by a licensed plumbing contractor to ensure alignment and leak prevention. Seat and supply line are not included and must be specified separately.

Contractor Considerations

• ✔️ ADA Height Bowl: Ideal for public-use and residential applications requiring accessibility
• ✔️ Reliable Siphon Jet Performance: Dual-fed system reduces post-flush cleaning frequency
• ✔️ Low Consumption: Helps meet LEED and code-mandated water conservation goals