Pair of VIVOSUN 4-inch black pre-filter sleeves with textured fabric and green stitching, for carbon filters.

Diagram of good air filtration: air flows through a black filter and white 'pp cotton' for odor control.

Cutaway view of a grow tent ventilation system showing an inline fan, carbon filter, and airflow within a green tent frame.

VIVOSUN grow tent interior with carbon filter, AeroZesh inline fan, LED grow lights, and a digital climate controller.

Black VIVOSUN 4-inch prefilter for carbon filter, made of durable PP cotton, reusable, and washable.

Black 4-inch pre-filter for carbon filter, split view reveals textured outer layer and honeycomb mesh. Lists PP cotton, reusable features.

Black VIVOSUN 4-inch prefilter for carbon filters, PP cotton, showing dimensions (6.94", 9.84") & 1.8mm thickness.

Black VIVOSUN 4-inch prefilter for carbon filters, PP cotton, showing dimensions (6.94

VIVOSUN 4" Pre-Filter Cloth for Inline Carbon Filter - Black

Price:

$15.99 USD

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$1599/mo

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MODEL: WEB-CFPB-4x2

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VIVOSUN 4" Pre-Filter Cloth for Inline Carbon Filter - Black | 2 Pack

Is dust and debris clogging your 4-inch carbon filter, forcing you to replace it sooner than you'd like? Protect your investment and maintain peak air quality with the VIVOSUN 4" Pre-Filter Cloth, the essential first line of defense for your ventilation system.

Specifically designed for compact setups, this pre-filter seamlessly integrates with any standard 4-inch carbon filter, making it ideal for smaller grow tents and personal growing cabinets. Crafted from premium 1.8mm thick PP cotton, it effectively captures hair, dust, lint, and other large particles before they can compromise your filter's charcoal bed. This not only extends the life of your main filter but also ensures your ventilation system, like those in our VIVOSUN air filtration kits, operates at maximum efficiency.

The custom-molded sleeve design allows for instant, tool-free installation and removal. Best of all, each pre-filter is fully washable and reusable, surviving multiple cleaning cycles without losing effectiveness. This makes it an economical and sustainable choice for any grower looking to save money and reduce waste.

What's Included

2x VIVOSUN 4" Pre-Filter Cloths - Black

Features

🛡️

Reliable Protection

Thick 1.8mm PP cotton blocks hair, dust, and lint from reaching your carbon filter.

🔄

Washable & Reusable

Easily washed to restore performance, providing excellent value and reducing waste.

🌬️

Unrestricted Airflow

Breathable material maintains your fan's efficiency without compromising filtration.

⏱️

Effortless Installation

The flexible sleeve design slips on and off your filter in seconds with no tools required.

Specifications

Specification	Value
Filter Size	4 Inch Diameter
Material	High-Quality PP Cotton
Thickness	1.8mm
Color	Black
Quantity	2 Pack
Compatibility	Standard 4" Carbon Filters
Ideal Application	Small Grow Tents, Stealth Boxes, Personal Growing Cabinets

Warranty

This VIVOSUN product is covered by a manufacturer's warranty. Please contact us for more details on warranty terms and claims.

FAQs

Is this pre-filter suitable for small grow tent setups?+

Absolutely. The 4-inch size is specifically designed for compact spaces like the Vivosun 2' x 2' Grow Tent, stealth boxes, and personal growing cabinets where efficient air filtration is critical. For more tips on optimizing small spaces, check out our guide on the best small grow tents.

How does this pre-filter protect my carbon filter?+

The 1.8mm thick PP cotton acts as a barrier, capturing larger particles like dust, hair, and pollen. This prevents the activated carbon in your Vivosun 4" Carbon Filter from clogging prematurely, which extends its lifespan and maintains its odor-neutralizing effectiveness.

Will this restrict airflow in my ventilation system?+

No, the material is engineered to be highly breathable. It maintains optimal airflow so your inline fan can operate efficiently, ensuring your environment remains stable without putting extra strain on your equipment. It's a perfect addition to any 4-inch air filtration kit.

How often should I clean the pre-filter?+

For optimal performance, we recommend checking and cleaning it every 2-4 weeks, depending on the dust levels in your environment. Simply hand wash with mild soap and warm water, rinse thoroughly, and let it air dry completely before reinstalling.

Can I install this without taking my whole setup apart?+

Yes. The tool-free sleeve design allows you to easily slide the pre-filter on and off your existing 4-inch carbon filter. This is especially convenient in tight spaces where disassembling your ventilation system would be difficult.

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

Most orders are processed within 24-48 hours after being placed.

Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

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