Introduction
This manual provides instructions for the installation, maintenance, and specifications of the Generic 90304 Replacement Filter. This filter is designed for use with various 5-gallon and larger wet/dry vacuum cleaners.
Compatibility
The 90304 Replacement Filter is compatible with the following vacuum models and filter types:
- Vacuum Models: BLB450, BLB550, BLB560C, CH87-650C, LB650C, MSC85EM300, MSC85L450, MSC85L500, MSC85L600C, MSC85M250B, MSCQPL55, MSCSS12-250, SSP16-500A, SSP16-600C, SS12-350A, SS14-450, SS16-SQ550, SS16-SQ650, 86MTSQ550, SL16-575A, SS11-450, SS12-300A, SS14-350A, SS14-550A, SS14-600C, SS16-450, SS16-550A, SS16-650C, 16RT500A, 16RTP550A, 4045AH, 85L450, 85L575, 86EM350, 86L500A, 86M350, 86MT600C, 86ST450, 87L500A, 87L650C, 87M350, 87P500A, 87P650C, 92L550A, 92L650C, 92P650C.
- Filter Types: Type U 9030400, Type X 9035000, Type W 9034000, 90304, 9030400 cartridge filters.
Setup and Installation
Follow these steps to properly install your replacement filter:
- Safety First: Ensure the vacuum cleaner is unplugged from the power source before beginning installation.
- Access Filter Compartment: Open the vacuum's filter compartment. Refer to your vacuum cleaner's specific manual for instructions on how to access this area.
- Remove Old Filter: Carefully remove the old filter. Dispose of it according to local regulations.
- Inspect Filter Area: Clean any debris or dust from the filter housing before installing the new filter.
- Install New Filter: Place the new Generic 90304 filter into the compartment, ensuring it is seated correctly and securely. The filter should fit snugly.
- Close Compartment: Close the filter compartment securely.
- Reconnect Power: Plug the vacuum cleaner back into the power source.

Image: The Generic 90304 replacement filter, showing its cylindrical shape and pleated design. This is the filter you will be installing.
Operating Considerations
While the filter itself does not have operational controls, proper usage of your vacuum cleaner with the installed filter is important for optimal performance:
- Dry Use: For dry vacuuming, ensure the filter is clean and dry.
- Wet Use: For wet vacuuming, some vacuum models may require the removal of the dry filter or the use of a specialized wet filter. Consult your vacuum's manual. The 90304 filter is designed for both wet and dry applications in compatible vacuums.
- Regular Checks: Periodically check the filter for excessive dirt buildup, which can reduce suction efficiency.
Maintenance
Regular maintenance of your filter ensures optimal vacuum performance and extends the life of the filter.
Cleaning the Filter
- Remove Filter: Unplug the vacuum and remove the filter as described in the "Setup and Installation" section.
- Tap Clean: Gently tap the filter against a hard surface to dislodge loose dirt and debris.
- Rinse (Optional, for heavy dirt): If the filter is heavily soiled, it can be rinsed under running water. Ensure the water flows from the inside out to push debris away from the pleats.
- Dry Completely: Allow the filter to air dry completely before reinstallation. Do not use heat to dry the filter, as this can damage the material. Ensure it is bone dry to prevent mold growth and damage to the vacuum motor.
- Reinstall: Once dry, reinstall the filter.
Filter Replacement
The filter should be replaced when it shows signs of wear, damage, or if cleaning no longer restores adequate suction. The frequency of replacement depends on usage and the type of debris collected.

Image: A top-down view of the filter, illustrating the internal mesh structure and the black rubber seals.

Image: A close-up view of the filter's pleated material, highlighting the fine filtration surface.
Troubleshooting
If you encounter issues after installing the new filter, consider the following:
- Reduced Suction:
- Ensure the filter is installed correctly and seated snugly.
- Check if the filter is clogged. Clean or replace if necessary.
- Verify that the vacuum's hose, attachments, and dustbin are clear of obstructions.
- Filter Not Fitting:
- Double-check the compatibility list to ensure this filter is correct for your vacuum model.
- Ensure no old filter parts or debris are obstructing the filter compartment.
- Unusual Noises:
- Ensure the filter is securely in place. A loose filter can cause vibrations.
- If noises persist, consult your vacuum cleaner's manual or a qualified technician.
Specifications
| Feature | Detail |
|---|---|
| Model Number | 90304 |
| Brand | Generic |
| Material | Plastic (frame), Filter Media (pleated material) |
| Reusability | Reusable (cleanable) |
| Number of Pieces | 1 |
| Approximate Dimensions | 10.16 x 8.94 x 7.24 inches (25.8 x 22.7 x 18.4 cm) |
| Approximate Weight | 10 ounces (283 grams) |
| Color | White (filter media), Black (frame) |

Image: The filter shown with its key dimensions: 5.90 inches (top diameter), 6.57 inches (height), and 7.40 inches (bottom diameter).
Warranty Information
No specific warranty information is provided for this product. Please refer to the retailer's return policy for details on returns or exchanges.
Support
For further assistance or inquiries regarding this replacement filter, please contact the manufacturer or the retailer from whom the product was purchased.