1. Product Overview
The M.D. Manufacturing 720H-5 Paper Bag is an 8-gallon hyper flow filter bag designed for use with Modern Day and Silent Master central vacuum units that are under 34 inches tall. This package contains 5 disposable filter bags, providing essential filtration for your central vacuum system.
- Capacity: 8-gallon
- Compatibility: Fits Modern Day and Silent Master central vacuum units under 34 inches tall.
- Quantity: 5 bags per pack.
- Material: Paper.
- Dimensions: Approximately 13 inches (L) x 3.5 inches (W) x 11.5 inches (H).
2. Installation and Replacement
Proper installation of the disposable filter bag is crucial for the efficient operation of your central vacuum system. Always ensure the central vacuum unit is turned off and unplugged before performing any maintenance.

Image: Three MD Hyperflow disposable filter bags, showing the product and basic installation instructions printed on the bag itself.
2.1. To Remove a Disposable Filter Bag
- Power Off: Ensure the central vacuum power unit is completely turned off and unplugged from the electrical outlet to prevent accidental startup.
- Access Unit: Locate and open the access door or lid of your central vacuum power unit. This typically involves unlatching clips or unscrewing fasteners.
- Remove Old Bag: Carefully grasp the collar or top edge of the full disposable filter bag. Gently pull the bag out of its housing. Be cautious to avoid spilling collected debris.
- Seal and Dispose: If the bag has a sealing mechanism, close it to contain dust. Dispose of the full bag according to local waste disposal guidelines.
- Inspect Housing: Briefly inspect the bag housing area for any large debris or obstructions and remove them if present.
2.2. To Install a New Disposable Filter Bag
- Unpack New Bag: Remove a new M.D. Manufacturing 720H-5 filter bag from its packaging.
- Align Collar: Locate the inlet port inside your central vacuum unit where the bag attaches. Align the bag's collar or opening with this port.
- Secure Bag: Push the bag's collar firmly onto the inlet port until it is securely seated. Ensure there are no gaps that could allow debris to bypass the filter bag. Some units may have a retaining ring or clip to further secure the bag.
- Position Bag: Gently unfold and position the bag inside the vacuum unit's canister, ensuring it does not obstruct any internal components or the lid closure. The bag should hang freely.
- Close Unit: Close the access door or lid of the central vacuum unit, ensuring it is latched or screwed shut securely.
- Restore Power: Plug the central vacuum unit back into the electrical outlet.
3. Operation
Once installed, the M.D. Manufacturing 720H-5 filter bag operates passively as part of your central vacuum system. Air and debris are drawn into the bag, where the paper material filters out dust and particles, allowing clean air to pass through the motor and exhaust. The bag collects debris until it is full and requires replacement.
4. Maintenance
The primary maintenance for this product is its timely replacement. The frequency of bag replacement depends on usage and the amount of debris collected. It is recommended to check the bag periodically, especially if you notice a decrease in suction power.
- Regular Checks: Inspect the bag's fullness every 1-3 months, or more frequently with heavy use.
- Replacement Indicator: Replace the bag when it is approximately two-thirds full, or when suction power noticeably diminishes. Overfilling the bag can strain the vacuum motor and reduce efficiency.
- Disposal: Always dispose of used bags in a sealed container to prevent dust from re-entering the environment.
5. Troubleshooting
While filter bags are simple components, certain issues can arise:
- Reduced Suction:
- Cause: The most common cause is a full or nearly full filter bag.
- Solution: Check the bag and replace it if it's full.
- Cause: Improperly installed bag, allowing air to bypass the filter.
- Solution: Re-install the bag, ensuring the collar is securely seated on the inlet port.
- Dust Escaping Unit:
- Cause: Bag not properly sealed or installed.
- Solution: Ensure the bag's collar is tightly sealed around the inlet and the unit's lid is closed securely.
- Cause: Damaged or torn bag.
- Solution: Replace the bag immediately.
- Bag Does Not Fit:
- Cause: Incorrect bag size or model for your central vacuum unit.
- Solution: Verify your central vacuum unit's model and ensure it is compatible with 8-gallon bags designed for Modern Day and Silent Master units under 34 inches tall. Refer to your central vacuum system's manual for compatible bag types.
6. Specifications
| Attribute | Detail |
|---|---|
| Brand | M.D. Manufacturing |
| Model Number | 720H-5 |
| Capacity | 8 Gallons |
| Unit Count | 5.0 Count (5 bags per pack) |
| Material | Paper |
| Item Form | Bag |
| Item Dimensions (L x W x H) | 13 x 3.5 x 11.5 inches |
| Item Weight | 10.4 ounces (total package) |
7. Warranty and Support
For specific warranty information regarding the M.D. Manufacturing 720H-5 Paper Bags, please refer to the packaging or contact M.D. Manufacturing directly. As a consumable item, warranty coverage typically applies to manufacturing defects rather than normal wear and tear or improper installation.
For local sales and assistance, you may visit builtinvacuum.com, as indicated on the product packaging.





