Introduction
This manual provides essential information for the proper installation, operation, maintenance, and troubleshooting of your TOTO TWT172M DuoFit In-Wall Tank Unit. Please read these instructions thoroughly before beginning installation or use to ensure safe and efficient operation. The TOTO DuoFit In-Wall Tank Unit is designed to provide a concealed flushing system for wall-hung toilets, offering a sleek and minimalist bathroom aesthetic.
Safety Information
Always adhere to local plumbing and building codes during installation. Professional installation by a licensed plumber is highly recommended. Failure to follow these instructions could result in property damage or personal injury.
- Ensure the water supply is turned off before any installation or maintenance.
- Wear appropriate personal protective equipment (PPE) such as gloves and eye protection.
- Verify all connections are secure and leak-free before restoring water supply.
- Do not overtighten fittings, as this can cause damage.
- Keep small parts away from children.
Setup and Installation
The TOTO TWT172M DuoFit In-Wall Tank Unit is designed for concealed installation within a wall structure. This unit includes a robust steel frame and a copper supply line for durability and reliable performance.
Components Overview
The unit consists of an in-wall tank, a sturdy support frame, and a copper supply line. It is designed to integrate with compatible TOTO wall-hung toilet bowls and flush plates (sold separately).
Image: The TOTO DuoFit In-Wall Tank Unit, showing the blue steel frame, white tank, and copper supply line connection point.
Installation Steps (General Guidelines)
- Frame Mounting: Securely mount the steel support frame to the structural studs within the wall according to the provided template and local building codes. Ensure the frame is level and at the correct height for the chosen wall-hung toilet.
- Water Supply Connection: Connect the copper supply line to the main water supply. Ensure all connections are watertight.
- Drainage Connection: Connect the toilet drain outlet to the building's waste system.
- Tank Installation: The tank unit is integrated into the frame. Ensure all internal tank components are correctly seated.
- Wall Finishing: Once the frame and plumbing are installed and tested, the wall can be finished around the frame, leaving access for the flush plate and toilet bowl connections.
- Toilet Bowl and Flush Plate Installation: Install the wall-hung toilet bowl onto the frame's mounting bolts and connect the flush plate to the tank's flushing mechanism.
Image: The TOTO DuoFit In-Wall Tank Unit shown with a wall-hung toilet bowl and a dual-flush plate installed, demonstrating the complete concealed system.
Operating Instructions
The TOTO DuoFit In-Wall Tank Unit operates in conjunction with a compatible dual-flush plate. This system allows for two flushing options to conserve water.
Flushing the Toilet
- Full Flush: Press the larger button on the flush plate for a full flush, typically used for solid waste.
- Light Flush: Press the smaller button on the flush plate for a light flush, typically used for liquid waste, conserving water.
Image: The TOTO DuoFit In-Wall Tank Unit with a dual-flush plate featuring two circular buttons, indicating full and light flush options.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your in-wall tank unit.
- Cleaning: Clean the visible parts of the flush plate and toilet bowl regularly with mild, non-abrasive cleaners. Avoid harsh chemicals that can damage finishes.
- Internal Components: For internal tank maintenance (e.g., float valve, flush valve), access is typically gained by removing the flush plate. Consult a qualified plumber for internal repairs or adjustments.
- Leak Checks: Periodically check for any signs of leaks around the toilet bowl base or flush plate area. Address any leaks immediately to prevent water damage.
Troubleshooting
Refer to the following table for common issues and their potential solutions. For complex problems, contact a professional plumber.
| Problem | Possible Cause | Solution |
|---|---|---|
| Toilet not flushing or weak flush | Low water level in tank, obstructed flush valve, flush plate mechanism issue. | Check water supply valve. Inspect flush valve for obstructions. Ensure flush plate is correctly installed and engaging the mechanism. |
| Continuous running water | Faulty fill valve, flush valve not sealing properly. | Inspect fill valve for proper operation. Clean or replace flush valve seal. |
| Visible leaks | Loose connections, damaged seals or pipes. | Turn off water supply. Tighten connections. Inspect and replace any damaged seals or components. |
Specifications
- Brand: TOTO
- Model Number: TWT172M (Item Model Number: WT172M)
- Product Dimensions: 20.5"D x 14.5"W x 14.5"H
- Material: Copper (supply line), Polyvinyl Chloride (seat material type, though this refers to a component, the tank itself is typically durable plastic/composite)
- Color: White (tank unit)
- Installation Type: Wall Mounted
- Shape: Rectangular (tank unit)
- Item Weight: Approximately 0.16 ounces (4.54 g) - Note: This weight likely refers to a specific component, not the entire tank unit.
- UPC: 739268341333
Warranty Information
The TOTO TWT172M DuoFit In-Wall Tank Unit is covered under TOTO's 1 Year Limited Warranty. This warranty covers defects in materials and workmanship under normal use and service. For full warranty details and terms, please refer to the official TOTO warranty documentation or contact TOTO customer service.
Support
For technical assistance, replacement parts, or further inquiries regarding your TOTO TWT172M DuoFit In-Wall Tank Unit, please contact TOTO customer service. You can find contact information on the official TOTO website or through your product retailer.
TOTO Official Website: www.totousa.com
