Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the GROHE 48359000 Faucet Replacement Cartridge. This component is designed to restore optimal function to compatible GROHE bathroom sink faucets. Please read all instructions carefully before beginning installation to ensure proper function and safety.
Safety Information
- Always turn off the water supply to the faucet before beginning any installation or maintenance.
- Wear appropriate personal protective equipment, such as safety glasses and gloves.
- If you are unsure about any step, consult a qualified plumber.
- Keep small parts away from children.
Package Contents
Verify that all components are present before proceeding with installation.
- 1 x GROHE 48359000 Faucet Replacement Cartridge
- (Additional components may vary by faucet model; refer to your faucet's specific manual for full parts list.)
Setup and Installation
Tools Required:
- Adjustable wrench or basin wrench
- Screwdriver (flathead or Phillips, depending on faucet handle)
- Hex key (if required for handle removal)
- Soft cloth
- Bucket or towel for catching drips
Installation Steps:
- Turn off Water Supply: Locate the hot and cold water supply valves under the sink and turn them clockwise until fully closed. Turn on the faucet to drain any remaining water and confirm the supply is off.
- Remove Faucet Handle: Depending on your faucet model, you may need to pry off a decorative cap to expose a screw (usually a Phillips or hex screw). Unscrew it and carefully lift off the handle.
- Remove Retaining Nut/Cap: Once the handle is off, you will see a retaining nut or cap that holds the cartridge in place. Use an adjustable wrench to carefully loosen and remove this component.
- Extract Old Cartridge: Gently pull the old cartridge straight up and out of the faucet body. It may require a slight twist. Note its orientation for reference.
Figure 1: Removal of the old faucet cartridge. Ensure water supply is off.
- Clean Faucet Body: Use a soft cloth to clean any debris or mineral deposits from inside the faucet body where the cartridge sits.
- Install New Cartridge: Carefully insert the new GROHE 48359000 replacement cartridge into the faucet body. Ensure it is seated correctly and aligned with any notches or pins in the faucet body. Do not force it.
- Reinstall Retaining Nut/Cap: Hand-tighten the retaining nut or cap over the new cartridge, then use the wrench to tighten it securely, but do not overtighten.
- Reattach Faucet Handle: Place the faucet handle back onto the stem, secure it with the screw, and replace any decorative caps.
- Restore Water Supply: Slowly turn on the hot and cold water supply valves under the sink. Check for any leaks around the faucet base and connections.
- Test Faucet: Operate the faucet handle through its full range of motion (hot, cold, mixed, on, off) to ensure proper function and check for leaks.
Operating Instructions
After successful installation, the faucet should operate as intended. The cartridge controls the water flow and temperature. Move the handle to adjust water flow and rotate it to control temperature (typically left for hot, right for cold, center for mixed).
Maintenance
- Cleaning: Clean the exterior of your faucet regularly with a soft cloth and mild soap. Avoid abrasive cleaners or harsh chemicals, as these can damage the finish.
- Leak Checks: Periodically check under the sink for any signs of leaks around the water supply lines and faucet connections. Address any leaks promptly.
- Aerator Cleaning: If water flow becomes restricted, the faucet aerator may be clogged. Unscrew the aerator from the spout, clean any debris, and reinstall.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Faucet leaks from handle base | Cartridge not seated correctly or retaining nut loose. | Turn off water, re-seat cartridge, and tighten retaining nut. Do not overtighten. |
| Low water flow | Clogged aerator or partially closed supply valves. | Clean aerator. Ensure supply valves are fully open. |
| Water temperature not adjusting | Cartridge installed incorrectly or internal issue. | Turn off water, remove and re-install cartridge ensuring correct orientation. If problem persists, contact support. |
Specifications
- Manufacturer: Grohe
- Part Number: 48359000
- Item Weight: 5.3 ounces
- Product Dimensions: 6.5 x 4.53 x 1.97 inches
- Item Model Number: 48359000
- Color: GROHE CHROME (Note: This refers to the faucet finish, not the cartridge itself.)
- Finish: CHROME (Note: This refers to the faucet finish, not the cartridge itself.)
- Installation Method: Wall Mounted (Note: This refers to the faucet type, not the cartridge installation.)
- Item Package Quantity: 1
Warranty and Support
For warranty information or technical support, please refer to the official GROHE website or contact GROHE customer service directly. Keep your purchase receipt as proof of purchase.
GROHE Official Website: www.grohe.us





