1. Introduction
Thank you for choosing the isinlive 90304 Replacement Filter Kit. This kit is designed to provide efficient filtration for your Shop-Vac wet dry vacuum cleaner, ensuring optimal performance for both wet and dry debris collection. This manual provides essential information for proper installation, usage, and maintenance of your new filters.

Image 1: Overview of the isinlive 90304 Replacement Filter Kit and compatible Shop-Vac.
2. Compatibility
This filter kit is compatible with most Shop-Vac 5-gallon and above wet dry vacuum cleaners. It replaces Shop-Vac Filter models 90304, 90585, 90350, and 90333. Specifically, it fits:
- Shop-Vac Type U 9030400 Filters
- Shop-Vac Type X 9035000 Filters
- Models such as BLB450, SSP16-500A, SSP16-600C, SS12-350A, SS14-450, SS16-SQ550, SS16-SQ650, 86MTSQ550, and many others listed in your vacuum's manual.
NOTE: This kit is NOT compatible with 5-gallon Portable model H87S and HangUp vacuums.

Image 2: Visual guide to compatible Shop-Vac models and filter types.
3. Kit Components
Your isinlive 90304 Replacement Filter Kit includes the following items:
- 2 x Cartridge Filters (90304): For dry vacuuming.
- 2 x Lids: For securing the cartridge filters.
- 4 x Foam Sleeve Filters (90585): For wet vacuuming.
- 1 x Cleaning Brush: For maintaining the cartridge filter.
4. Installation Instructions
Follow these steps to install the appropriate filter for your cleaning task:
- Prepare Your Vacuum: Disconnect the vacuum from the power source. Unlatch and remove the motor head from the collection tank.
- Remove Old Filter: Carefully remove the old filter assembly. If a foam sleeve is present, remove it first, then unfasten and remove the cartridge filter. Dispose of old filters responsibly.
- Install New Filter:
- For Dry Vacuuming (Cartridge Filter 90304): Slide a new cartridge filter onto the filter cage on the motor head. Secure it in place with one of the provided lids by twisting until tight.
- For Wet Vacuuming (Foam Sleeve Filter 90585): Ensure no cartridge filter is installed. Slide a foam sleeve filter over the filter cage on the motor head. No lid is typically used with the foam sleeve alone.
- Reassemble: Place the motor head back onto the collection tank and secure the latches. Reconnect the vacuum to the power source.

Image 3: Step-by-step installation of the cartridge filter.
5. Operating Guidelines
It is crucial to use the correct filter type for your cleaning application to prevent damage to the vacuum and ensure effective filtration.
- Dry Vacuuming: Use the Cartridge Filter (90304) for collecting dry debris such as dust, dirt, wood chips, paper crumbs, lint, pet dander, and pollen. This filter features advanced HEPA filtration technology, capturing 99.97% of airborne particles as small as 0.3 microns.
- Wet Vacuuming: Use the Foam Sleeve Filter (90585) for collecting liquids and wet debris. The foam sleeve protects the motor from moisture.
IMPORTANT: Do NOT use the 90304 cartridge filter and 90585 foam sleeve filter at the same time. Using the foam sleeve over the cartridge filter can damage both filters and reduce vacuum performance.

Image 4: Correct filter usage for wet and dry vacuuming.
6. Maintenance and Cleaning
Regular cleaning and timely replacement of filters are essential for maintaining your vacuum's suction power and air quality.
- Cartridge Filter (90304) Cleaning: The cartridge filter can be cleaned by gently tapping it to dislodge debris or by using the provided cleaning brush to remove dust from the pleats. For deeper cleaning, it can be washed with water. Ensure the filter is completely dry before reinstallation to prevent mold growth and damage.
- Foam Sleeve Filter (90585) Cleaning: The foam sleeve filter is washable. Rinse it under running water until clean. Squeeze out excess water and allow it to air dry completely before reinstallation.
- Replacement Frequency: It is recommended to replace the filters every 3-6 months, or more frequently with heavy use, to maintain optimal performance and air quality. If you notice a decrease in suction power, clean or replace the filter.

Image 5: Illustrates the washable and reusable nature of the filters.
7. Troubleshooting
- Reduced Suction: Check if the filter is clogged. Clean or replace the filter as per maintenance instructions. Ensure the filter is correctly installed and sealed.
- Dust Escaping: Verify that the cartridge filter is securely fastened with its lid and that the motor head is properly latched onto the tank. Ensure the correct filter type is used for dry vacuuming.
- Motor Damage during Wet Pickup: This usually indicates that a cartridge filter was used for wet vacuuming, or the foam sleeve was not properly installed. Always use the foam sleeve for wet applications and ensure it covers the filter cage completely.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | isinlive |
| Model Numbers | 90304, 90585 (compatible with 90350, 90333) |
| Material | Cotton, Foam, Metal |
| Reusability | Reusable (washable) |
| Product Dimensions (Cartridge Filter) | Approx. 6.7" H x 7.6" W (top diameter 6.29") |
| Product Dimensions (Foam Sleeve Filter) | Approx. 5.39" H x 5.43" W |
| Filtration Efficiency (90304) | 99.97% of particles as small as 0.3 microns |
| Number of Pieces in Kit | 9 (2 Cartridge Filters, 2 Lids, 4 Foam Sleeve Filters, 1 Brush) |

Image 6: Dimensions of the cartridge and foam sleeve filters.
9. Warranty Information
This isinlive product comes with a one-year warranty. For warranty claims or further assistance, please contact the manufacturer directly through your purchase platform or their official website.
10. Customer Support
If you have any questions, concerns, or require technical assistance regarding your isinlive 90304 Replacement Filter Kit, please refer to the customer support options provided by your retailer or contact isinlive directly. Always provide your product model number and purchase details when seeking support.