Kohler K-6428 Features:

• One-piece configuration provides a uniform look and simplifies installation
• Elongated bowl offers comfort and convenience, extending out an extra 1-1/2″ compared to a round configuration
• Covered under Kohler’s 1 year limited warranty
• Constructed of vitreous china
• Comfort Height – designed for ease of use, with a higher than average bowl
• WaterSense certified – toilet uses 20% less water than the current standard while still maintaining superior performance
• Concealed trapway – a built in skirt hides the discharge passageway from view, for a smoother, less utilitarian appearance
• Includes a soft close seat with grip-tight cover

Kohler K-6428 Technologies / Benefits:

• AquaPiston: AquaPiston single flush canister technology uses the force of gravity and a precision-engineered tank, bowl, and trapway to create a strong, efficient siphon during flushing. The canister flush valve’s 3:2 ratio optimizes flush performance and resists warping and deterioration, while its durable design features 90% less exposed seal material than a standard 3-inch flapper flush valve, guaranteeing leak-free performance. The light-touch canister requires lower activation force than a flapper, and once activated, allows water to flow into the bowl from all sides (360 degrees), increasing each flush’s power and effectiveness.
• Comfort Height: Comfort Height toilets offer the greatest accessibility and ease of use with a bowl height of between 16-1/2″ and 18″, the same as a standard chair.
• WaterSense Certified Product: To help make a difference on a global scale and to further its role as an industry leader in eco-performance practices, Kohler has established partnerships with a number of environmental organizations, including WaterSense. Many Kohler faucets and toilets are equipped with low-flow technology – they use less water, while continuing to meet superior performance standards.

Kohler K-6428 Specifications:

• Overall Height: 28-1/4″ (bottom of base to top of tank)
• Overall Depth: 27-3/4″ (back of tank to front of rim)
• Overall Width: 18-1/4″ (rightmost to leftmost edge of toilet)
• Bowl Height: 16-1/2″ (floor to bowl rim)
• Flow Rate: 1.28 gallons-per-flush
• Water Area: 9-5/8″ x 7-3/8″ (inner rim dimensions of bowl, length x width)
• Water Depth (from Rim): 5-3/8″
• Tank Width: 18-1/4″ (leftmost to rightmost edge of tank)
• Tank Depth: 7-7/16″ (back edge to front edge of tank)
• Trapway (Discharge Passageway) Size: 2-1/8″
• Distance Between Toilet Seat Installation Holes: 5-1/2″
• Rough-In: 12″
  • 10″ Rough-In available with separate purchase of K-5383 (10″ Rough-in Full skirt trap and attachment system)
  • 14″ Rough-In available with separate purchase of K-5381 (14″ Rough-in Full skirt trap and attachment system)

Dimensions and Measurements

Included Components

Included Components

Characteristics and Features

Manufacturer Technology

Warranty and Product Information

Warranty and Product Information