Introduction
This manual provides detailed instructions for the installation, operation, maintenance, and troubleshooting of the Pfister 9740740 Avalon/Treviso 26/529 Series 25mm Cartridge Sub Assembly. This genuine Pfister replacement part is designed to restore optimal function to compatible Pfister faucets, addressing issues such as leaks or stiff handle operation.
The Pfister 9740740 cartridge is a critical component for controlling water flow and temperature in single-handle faucets. Proper installation and care will ensure long-lasting performance.
Safety Information
- Always turn off the main water supply to the faucet before beginning any installation or maintenance.
- Wear appropriate personal protective equipment, such as safety glasses, to prevent injury.
- Ensure the work area is well-lit and clear of obstructions.
- If you are unsure about any step, consult a qualified plumber.
Setup and Installation
The following steps outline the general procedure for replacing your faucet cartridge. Specific faucet models may vary slightly.
- Prepare the Faucet: Turn off the hot and cold water supply lines to the faucet. Open the faucet handle to relieve any remaining water pressure.
- Remove the Faucet Handle: Locate the set screw on the faucet handle, typically on the underside or back. Use an appropriately sized Allen wrench (hex key) to loosen and remove this screw. Carefully pull the handle off the faucet body.
- Access the Cartridge: Unscrew any decorative cap or retaining nut that covers the cartridge. This may require a large pair of pliers or a wrench. Grip the retaining device firmly on its flat surfaces and turn counter-clockwise to loosen.
- Remove the Old Cartridge: Once the retaining device is removed, carefully pull the old cartridge straight out of the faucet body. Some older cartridges may have a seal (often red or black) that needs to be gently scraped out if it remains in the faucet body.
- Install the New Cartridge: Insert the new Pfister 9740740 cartridge into the faucet body. Ensure the two alignment nipples on the bottom of the cartridge are correctly seated in the corresponding slots in the faucet body. The cartridge should slide in smoothly and sit flush.
- Reassemble the Faucet: Screw the retaining device back into place, tightening it securely but not excessively to avoid damaging the new cartridge. Replace any decorative caps. Reattach the faucet handle, aligning it correctly, and tighten the set screw.
- Test the Faucet: Slowly turn the hot and cold water supply lines back on. Check for any leaks around the faucet base and handle. Operate the faucet handle to ensure smooth movement and proper water flow and temperature control.
Operating the Faucet (After Cartridge Replacement)
Once the new cartridge is installed, the faucet should operate smoothly. The handle controls both water flow and temperature. Moving the handle up or down typically controls the flow rate, while moving it left or right adjusts the temperature from cold to hot.
Ensure the handle moves freely and provides precise control over water output without excessive force or looseness.
Maintenance
The Pfister 9740740 cartridge is designed for durability. Regular maintenance of your faucet can help prolong its lifespan and prevent future issues:
- Cleaning: Periodically clean the exterior of your faucet with a soft cloth and mild soap. Avoid abrasive cleaners that can damage the finish.
- Lubrication: If the faucet handle feels stiff over time, a small amount of plumber's silicone grease or petroleum jelly can be applied to the cartridge's O-rings or seals during reinstallation to ensure smooth operation. This should only be done if the cartridge is removed for inspection or replacement.
- Leak Checks: Regularly inspect the area around your faucet for any signs of leaks. Addressing small drips promptly can prevent larger issues.
Troubleshooting
If you encounter issues after replacing the cartridge, consider the following:
| Problem | Possible Cause | Solution |
|---|---|---|
| Faucet still leaks after cartridge replacement. | Improper cartridge seating; damaged O-rings/seals (unlikely with new cartridge); debris in valve body. | Ensure cartridge is fully seated and retaining nut is tightened correctly. Inspect valve body for debris before installing new cartridge. |
| Faucet handle is loose or drops down. | Set screw on handle is loose; cartridge not fully engaged with handle. | Tighten the set screw on the faucet handle. Ensure the handle is properly aligned and fully engaged with the cartridge stem. |
| Water flow is low or inconsistent. | Aerator clogged; debris in water lines; cartridge not fully open. | Clean or replace the faucet aerator. Flush water lines before installing cartridge. Ensure cartridge is fully installed and handle allows full range of motion. |
| No hot or cold water. | Water supply valve closed; cartridge installed incorrectly. | Check that hot/cold water supply valves are fully open. Re-check cartridge alignment during installation. |
Specifications
| Attribute | Detail |
|---|---|
| Manufacturer | Pfister |
| Part Number | 974-0740 |
| Item Weight | 0.634 ounces |
| Product Dimensions | 0.75 x 0.75 x 0.75 inches |
| Item Model Number | 9740740 |
| Size | 1-7/8 inch (L) |
| Color | No Finish |
| Material | Plastic |
| Included Components | Price Pfister Single Lever Ceramic Disc Cartridge - 25mm |
Warranty Information
The Pfister 9740740 Cartridge Sub Assembly is backed by Pfister's Limited Lifetime Warranty. This warranty covers the finish and function of the product for as long as you own your home. For detailed warranty terms and conditions, please refer to the official Pfister website or contact customer support.
Support
For further assistance, technical support, or warranty claims, please visit the official Pfister website or contact their customer service department. You can find more information and explore other Pfister products at the Pfister Store on Amazon.
