1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your NuFlush 3-inch Two-Piece Dual Flush Valve with Cable Controlled Handle. This product is designed to replace existing 3-inch flush valves in two-piece toilets, offering a water-saving dual flush mechanism.
2. Safety Information
Please read all instructions carefully before beginning installation. Observe the following safety precautions:
- Always turn off the water supply to the toilet before starting any work.
- Flush the toilet to empty the tank before disassembly.
- Wear appropriate personal protective equipment, such as gloves and eye protection.
- If you are unsure about any step, consult a qualified plumber.
- Keep small parts away from children.
3. Package Contents
Verify that all components are present before proceeding with installation:
- 3-inch Dual Flush Valve Assembly
- Cable Controlled Flush Handle (Right-handed)
- Tank-to-bowl Gasket
- Mounting Bolts and Washers

Image 3.1: All components of the NuFlush 3-inch Dual Flush Valve kit, including the main valve assembly, cable-controlled handle, tank-to-bowl gasket, and mounting hardware.
4. Specifications
| Feature | Specification |
|---|---|
| Product Type | Dual Flush Valve with Cable Controlled Handle |
| Flush Valve Size | 3 inches |
| Toilet Type Compatibility | Two-piece toilets |
| Handle Type | Cable-controlled, Right-handed |
| Material | High Impact ABS, Nylon Bolts, Rubber |
| Overall Height (from tank base) | Approximately 9 inches |
| UPC | 780042488416 |
| Model Number | 3-INCH-FLUSH-VALVE-WITH-CABLE |

Image 4.1: Dimensions of the NuFlush 3-inch Dual Flush Valve, showing a 9-inch height and 3-inch outlet diameter.
5. Installation Instructions
5.1 Tools Required (Not Included)
- Adjustable Wrench or Pliers
- Screwdriver (Phillips or Flathead, depending on existing bolts)
- Sponge or Towel
- Bucket (for residual water)
5.2 Removing the Old Flush Valve
- Turn off the water supply valve located at the base of the toilet.
- Flush the toilet to drain the tank. Hold the handle down until most of the water has emptied.
- Use a sponge or towel to remove any remaining water from the tank.
- Disconnect the water supply line from the fill valve.
- Unscrew the nuts from the tank-to-bowl bolts located underneath the toilet tank.
- Carefully lift the toilet tank off the bowl and place it on a protected surface.
- Remove the old flush valve and gasket from the tank. Clean the tank's flush hole thoroughly.
5.3 Installing the New NuFlush Valve
- Place the new tank-to-bowl gasket onto the threaded base of the NuFlush valve. Ensure it is seated correctly.
- Insert the flush valve assembly into the large opening at the bottom center of the toilet tank. Ensure the overflow tube is positioned correctly.
- From the underside of the tank, secure the flush valve with the large plastic nut provided. Hand-tighten first, then use a wrench for a snug fit, but do not overtighten.
- Re-position the toilet tank onto the toilet bowl, aligning the bolt holes.
- Insert the new mounting bolts through the tank and bowl holes. Secure with washers and nuts from underneath the bowl. Tighten evenly to prevent cracking the tank or bowl.
- Install the cable-controlled flush handle into the right-hand side opening of the toilet tank. Secure it with the provided nut.
- Connect the cable from the flush valve to the flush handle lever. Ensure the cable has enough slack to operate smoothly without kinking.
- Reconnect the water supply line to the fill valve.
- Slowly turn on the water supply valve and allow the tank to fill. Check for any leaks around the flush valve, tank-to-bowl connection, and water supply line.

Image 5.1: Bottom view of the NuFlush 3-inch Dual Flush Valve, showing the threaded base where the tank-to-bowl gasket and nut are installed.

Image 5.2: The NuFlush 3-inch Dual Flush Valve assembly with the cable connected to the flush handle, illustrating the complete setup before final tank installation.
6. Operating Instructions
The NuFlush dual flush valve provides two flushing options to conserve water:
- Half Flush (Liquid Waste): Push the flush handle up. This releases a smaller volume of water, suitable for liquid waste.
- Full Flush (Solid Waste): Push the flush handle down. This releases the full volume of water from the tank, suitable for solid waste.
Ensure the handle returns to its neutral position after each flush to allow the tank to refill properly.
7. Maintenance
Regular maintenance helps ensure the longevity and efficient operation of your flush valve:
- Cleaning: Periodically inspect the flush valve for mineral buildup or debris. Clean with a soft brush and mild, non-abrasive cleaner if necessary. Avoid harsh chemicals that can damage rubber components.
- Leak Check: Regularly check for leaks. A common method is to add a few drops of food coloring to the tank water. If color appears in the bowl without flushing, there is a leak.
- Cable Inspection: Ensure the cable is free from kinks and operates smoothly.
- Gasket Condition: Over time, rubber gaskets can degrade. If leaks persist, the tank-to-bowl gasket or the flush valve's internal seal may need replacement.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Toilet runs continuously or refills frequently. | Flush valve seal not seating properly; debris under seal; water level too high. | Inspect and clean the flush valve seal. Adjust the fill valve to lower the water level if it's overflowing into the overflow tube. |
| Incomplete or weak flush. | Water level too low; cable not adjusted correctly; obstruction in the bowl. | Adjust the fill valve to raise the water level. Ensure the cable provides full lift of the flush valve. Check for clogs in the toilet bowl. |
| Flush handle is stiff or not returning. | Cable kinked or obstructed; handle mechanism binding. | Check the cable for kinks and ensure it moves freely. Lubricate handle pivot points if necessary. Ensure the handle is installed on the right side of the tank. |
| Water leaking from tank base. | Tank-to-bowl gasket improperly seated or damaged; mounting bolts loose. | Ensure the tank-to-bowl gasket is correctly positioned and not damaged. Tighten tank mounting bolts evenly, but do not overtighten. |
9. Warranty and Support
For specific warranty information or technical support, please contact NuFlush directly. Keep your purchase receipt as proof of purchase.
You can typically find contact information on the manufacturer's website or through your retailer.