1. Introduction
Thank you for choosing the Ideal Standard Complete Diverter, Model A963952NU. This manual provides essential information for the safe installation, operation, and maintenance of your new diverter. Please read these instructions carefully before beginning installation and retain them for future reference.
This product is designed for use in bathroom plumbing systems, specifically for diverting water flow between different outlets, such as a bath spout and a shower head.
2. Safety Information
- Professional Installation Recommended: Installation should ideally be performed by a qualified plumber to ensure correct fitting and prevent leaks or damage.
- Water Supply: Always turn off the main water supply before attempting any installation or maintenance.
- Tools: Use appropriate tools for installation. Incorrect tools can damage the product or plumbing.
- Material Compatibility: Ensure all connecting components are compatible with the diverter's steel alloy and aluminum construction.
- Leak Checks: After installation, thoroughly check for leaks before fully restoring water pressure.
3. Package Contents
Verify that all components are present before starting installation:
- 1 x Ideal Standard Complete Diverter (Model A963952NU)
Note: Screws or additional mounting hardware may not be included and should be sourced separately if required, as indicated by some user feedback.

Image 1: The Ideal Standard Complete Diverter, showing its main body and connection points.

Image 2: Close-up view of diverter components, highlighting internal parts.
4. Installation / Setup
This diverter is designed for soldering installation (Anlötmontage).
- Turn off Water Supply: Locate the main water shut-off valve and turn off the water supply to the bathroom. Open a faucet to drain any remaining water from the pipes.
- Remove Old Diverter (if applicable): Carefully remove the existing diverter or faucet assembly. Clean the area thoroughly.
- Prepare Connections: Ensure the pipe ends are clean, smooth, and free of burrs for a proper solder joint.
- Solder Installation: Apply flux to the pipe ends and the diverter's connection points. Heat the joint evenly with a torch and apply solder, allowing it to be drawn into the joint by capillary action. Ensure a complete and watertight seal.
- Secure the Diverter: Once the solder joints have cooled, secure the diverter in its final position.
- Connect Outlets: Connect the bath spout and shower head hoses/pipes to the appropriate outlets on the diverter.
- Test for Leaks: Slowly turn on the main water supply. Carefully inspect all connections for any signs of leaks. Tighten connections if necessary.
- Final Check: Operate the diverter to ensure smooth switching between water outlets.

Image 3: Internal body of the diverter, illustrating the part to be integrated into the plumbing system.
5. Operation
The Ideal Standard Complete Diverter allows you to easily switch the water flow between two different outlets, typically a bath filler and a shower head.
- To Select Bath Spout: Turn the diverter handle or pull the knob to the position designated for the bath spout. Water will flow from the bath spout.
- To Select Shower Head: Turn the diverter handle or push the knob to the position designated for the shower head. Water will flow from the shower head.
Ensure the diverter is fully engaged in either position to prevent water from flowing from both outlets simultaneously or causing reduced pressure.
6. Maintenance
Regular cleaning and proper care will ensure the longevity and optimal performance of your diverter.
- Cleaning: Clean the exterior of the diverter with a soft cloth and mild, non-abrasive cleaning agents. Avoid harsh chemicals, abrasive pads, or acidic cleaners, as these can damage the finish.
- Internal Cleaning: If water flow becomes restricted or the diverter mechanism feels stiff, it may indicate mineral buildup. In such cases, professional servicing is recommended to clean or replace internal components like cartridges.
- Spare Parts: Ideal Standard offers spare parts for this product. Refer to the 'Warranty and Support' section for details on obtaining replacements.

Image 4: Example of a diverter cartridge, a key internal component that may require replacement over time.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Water leaks from connections | Improperly soldered joint, loose connection. | Turn off water supply, re-solder joint or tighten connections. Consult a plumber if unsure. |
| Diverter is stiff or hard to turn | Mineral buildup (limescale) inside the mechanism. | Professional cleaning or replacement of the diverter cartridge may be required. |
| Water flows from both outlets simultaneously | Diverter not fully engaged, worn internal seals or cartridge. | Ensure the diverter is fully switched. If the problem persists, the internal cartridge may need replacement. |
| Reduced water flow | Blockage in pipes, aerator, or diverter. | Check for blockages in the aerator (if applicable) or shower head. If the issue is with the diverter, professional inspection is recommended. |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Ideal Standard |
| Model Number | A963952NU |
| Color | Neutral |
| Material | Steel alloy, Aluminum |
| Mounting Type | Soldering (Anlötmontage) |
| Included Components | Complete Diverter |
| Number of Teeth | 22 |
9. Warranty and Support
This Ideal Standard product comes with a 2-year manufacturer's warranty. Please retain your proof of purchase for warranty claims.
Spare Parts Availability: Ideal Standard guarantees the availability of spare parts for this product for 10 years from the date of purchase. This ensures long-term usability and maintainability of your diverter.
For technical support, warranty claims, or to inquire about spare parts, please contact Ideal Standard customer service or visit their official website. You can find more information and contact details on the Ideal Standard Store on Amazon or their main corporate website.

Image 5: An example of Ideal Standard spare parts, illustrating the availability of components for maintenance and repair.