INSTALLATION INSTRUCTIONS
INTELLIGENT TOILET
K-8423A-0
VEIL WALL FACED
• We appreciate your commitment to Kohler quality. Please take a few minutes before you begin installation to review
this manual to become familiar with tools, materials and installation methods. If you encounter any installation or
performance problems, please don't hesitate to contact us. Thanks again for choosing Kohler Co.
• Please follow instructions closely to avoid costly mistakes caused by improper installation. Cover and protect the
components and fittings at all times during installation. Flush the plumbing lines before initial use.
• All information in this manual is based upon the latest product information available at the time of publication. Kohler
Co. reserves the rights to make changes in product characteristics, packaging or availability at any time without notice.
• Before continuing, please ensure there is no existing damage to the toilet and that there is suitable space for installation
with no interference with other bathroom fixtures such as shower door openings. Before proceeding with installation,
ensure there is ample room (approx 600mm) down each side of the pan to allow for servicing.
• To prevent serious damage, do not use corrosive solutions (see back page for care and cleaning information).
Any use of non-recommended products could void the Kohler warranty.
• This manual includes important care and cleaning information - please save these instructions.
Product Functions
Advantages for the In-wall Water Tank
• Hands-free flushing
• Manual dual-flush option
• Backflow prevention
• Pre-set water inlet level & flush volume
• Suitable for either S-trap or P-trap installations
• Anti-impact, rust-proof, macromolecule water tank reduces the possibility of leakages.
• Advanced water tank system is able to adjust 4.5/3 litre water discharge. To maintain the 4-star WELS rating, switch
off the Auto-flush option.
• No influence on wall structure, superb sound-proof effectiveness.
• Easy and quick installation saves time and labour.
• Easy servicing, wall reconstruction is not required.
• Sanitary system with no residual waste.
• Super thin tank body saves installation space and is applicable for all thin mounting walls.
COMPLIANCE: Ensure installation adheres to local building code & applicable plumbing/electrical standards.
• The Kohler Veil Intelligent Toilet - Wall Faced (
K-8423A-0) is WaterMark certified according to ATS 5200.051
Technical Specification for Plumbing and Drainage Products - Bidet Douche Seats.
• Installation must comply with AS/NZS 3500.1 Plumbing and Drainage - Water Services and AS/NZS 6400 Water
Efficient Products - Rating and Labelling.
Backflow Prevention
• The supplied Dual Check Valve is WaterMark certified according to AS 2845.1 Water Supply - Backflow Prevention
Devices - Materials, Design and Performance Requirements.
• Each site must have High Hazard Backflow Prevention installed upstream of the installation.
• For domestic installations, consult with a Licensed Practitioner (Plumber) before installation.
• For commercial applications, refer to a Hydraulic Consultant before specification or installation.
WARNING: Risk of electric shock. Disconnect power before servicing.
WARNING: Risk of electric shock. Connect only to a properly-grounded, grounding-type receptacle which is
protected by a Ground-Fault Circuit-Interrupter (GFCI) or Residual Current Device (RCD)
WARNING: Risk of electric shock. This product must be grounded. Connect only to a dedicated 220~240V AC,
50/60Hz circuit protected with grounded circuit-breaker or grounded electric leak circuit breaker
WARNING: 10A power supply is required.
Kohler Co. Jan 2018 1 1345889-A02-A
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