Kohler K3979-0, Comfort Height Two-Piece Toilet with Class Five Flush Technology and Left-hand Trip Lever, White, Elongated, 1.6 gpf, Highline Series

Kohler K-3979-0 Highline® Comfort Height® Elongated 1.6 gpf Two-Piece Toilet – White

The Kohler K-3979-0 Highline® Comfort Height® toilet is designed to meet the practical needs of professional installations while maintaining long-term performance. This two-piece elongated model features a 1.6 gpf Class Five® flush system for bulk waste removal and reliable bowl cleanliness. The Comfort Height® bowl complies with ADA requirements, offering a chair-height seating position ideal for residential and light commercial applications.

Product Highlights

• Flush Type: Class Five® technology uses a larger flush valve and optimized siphon jet to maximize waste removal
• Comfort Height® Bowl: 16-1/2" rim height allows easier use for most adults and meets ADA accessibility guidelines when installed with a compliant seat
• Bowl Shape: Elongated design improves comfort compared to standard round front bowls
• Material: Vitreous china construction ensures durability and a smooth, non-porous surface
• Installation: Standard 12" rough-in with a three-bolt tank mounting system

Technical Specifications

• Overall Length: 29-3/4"
• Overall Width: 18"
• Overall Height: 31-1/4"
• Flush Volume: 1.6 gallons per flush (6.0 L)
• Trapway: 2-1/8", fully glazed
• Rough-In: 12"
• Warranty: One-Year Limited

Installation Considerations

This model is designed for floor-mounted installation with a standard 12" rough-in. It includes the tank, bowl, and tank-to-bowl hardware. Seat and supply line must be sourced separately. The three-bolt mounting system aids in alignment and stability. While installation is straightforward, professional setup is recommended for code compliance and proper sealing.

Contractor Notes

• ✔️ Proven Flushing System: Class Five® platform supports high-traffic or heavy-use environments
• ✔️ ADA-Height Bowl: Ideal for accessibility upgrades or compliance projects
• ✔️ Standard Components: Compatible with most aftermarket toilet seats and supply lines