Grohe Universal Shower Cartridge 47995000
Product 47995000
Compatibility
The Grohe 47995000 Universal Shower Cartridge is compatible with Grohe valve 35015001, 35064001, 35065001, and 35066001.
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Installation
- Lubricate O-Rings: Apply silicone-based Plumberβs Grease on the Rubber O-Rings, to facilitate installation, for watertight seal, and to preserve the rubber.
- Installation Guide
Troubleshooting β
Shower Drips After Cartridge Installation
If the cartridge leaks immediately after installation, the new cartridge itself is not the most likely cause. In most cases, the problem is one of the following, listed in order of probability.
1. Mineral Deposits or Corrosion in the Valve Body (Most Common)
Even a small amount of calcium buildup where the cartridge O-rings seal can prevent a watertight seal. Many installers have found that a brand-new cartridge leaked until the valve body was cleaned, after which the cartridge sealed properly.
Recommended Procedure:
- Remove the cartridge.
- Inspect the brass valve body with a flashlight.
- Clean the sealing surfaces using:
- Gray Scotch-Briteβ’ pad
- Nylon brush
- White vinegar (to dissolve mineral deposits if necessary)
- Do not use sandpaper, steel wool, or metal tools that could scratch the brass sealing surfaces.
2. Dry or Pinched O-Rings
The O-rings on the cartridge should always be lubricated with a thin coat of 100% silicone plumber's grease before installation.
If installed dry, the O-rings may:
- Twist or roll during installation
- Fail to seat correctly
- Allow water to bypass the seal
Proper lubrication helps the cartridge slide smoothly into the valve body and prevents damage to the O-rings.
3. Cartridge Not Fully Seated
The cartridge must slide completely into the valve body before tightening the retaining ring or retaining nut.
Common causes include:
- Debris behind the cartridge
- An O-ring catching on the valve body
- The cartridge being slightly misaligned during installation
Important: Never use the retaining nut to force the cartridge into place.
4. Damaged Valve Body
If the original cartridge leaked for an extended period, the brass valve body may have become worn or pitted.
Inspect the valve body for:
- Pitting
- Scratches
- Grooves
- Corrosion
If any of these conditions exist, a new cartridge may not completely stop the leak.
5. Incorrect Cartridge Orientation
Although the cartridge is keyed to fit only one way, improper alignment with the locating tabs can prevent it from seating correctly.
6. Defective Replacement Cartridge
While uncommon, replacement cartridges can occasionally be defective.
Inspect the cartridge for:
- Cut or damaged O-rings
- Twisted seals
- Cracked plastic housing
- Damaged ceramic valve assembly
Determine Where the Leak Is Coming From
The location of the leak provides valuable clues for diagnosis.
| Leak Location | Possible Cause |
|---|---|
| Water drips from the shower head with the valve turned OFF | Cartridge not sealing internally, debris inside cartridge, worn ceramic discs, or damaged valve seat. |
| Water leaks behind the trim plate (escutcheon) | Damaged O-rings, cartridge not fully seated, or retaining nut not tightened properly. |
| Water leaks around the handle stem | Damaged stem seal. |
Recommended Troubleshooting Procedure
- Turn off the water supply.
- Remove the cartridge.
- Inspect the valve body for corrosion, mineral deposits, or damage.
- Thoroughly clean all sealing surfaces.
- Apply a light coating of 100% silicone plumber's grease to all O-rings.
- Reinstall the cartridge, ensuring it is fully seated.
- Tighten the retaining ring or retaining nut securely, but do not overtighten.
- Turn the water back on and test the valve before reinstalling the trim plate.