Fluval U4 Underwater Filter
Fluval U4 Underwater Filter
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Product Description
Product Description
Fluval U4 Underwater Filter
The Fluval U4 Underwater Filter is the largest Fluval U Series internal filter, designed for aquariums up to 65 US gallons / 240 L with powerful 3-stage underwater filtration, adjustable 3-way flow control, and flexible vertical or horizontal placement.
High-Capacity U Series Internal Filtration
The U4 provides the strongest flow and largest aquarium rating in the U Series, making it a useful primary filter for larger internal-filter setups or a supplemental filter for aquariums that need extra circulation and debris capture. It is ideal where external filtration is not possible, where tubing is undesirable, or where a fully submersible filter is the cleaner choice.
Fluval U4 Flow Control and Filtration Features
- 3-stage filtration combines foam pads, poly/carbon pads, and BIOMAX biological media for complete underwater filtration.
- 260 US GPH / 1000 LPH pump output provides strong water movement for larger aquariums.
- Adjustable 3-way flow lets you choose top output, integrated spray bar, or bottom output for different circulation needs.
- Top output supports maximum circulation and surface agitation for oxygenation.
- Spray bar output provides gentler even flow that can suit planted aquariums and calmer livestock.
- Bottom output helps move water lower in the aquarium for deeper agitation and improved circulation patterns.
- Flip-top lid makes media access fast without removing the entire filter from the aquarium.
- Versatile positioning allows vertical wall mounting or horizontal placement for shallow tanks and low-water applications.
Fluval U4 Underwater Filter Specifications
- Item number: A480
- UPC: 015561104807
- Aquarium capacity: up to 65 US gal / 240 L
- Pump output: 260 US GPH / 1000 LPH
- Wattage: 12W at 120 V / 60 Hz
- Dimensions: 13 in L x 4 in W x 4.5 in H / 33 x 10 x 11 cm
- Filter type: fully submersible internal aquarium filter
- Filtration stages: mechanical, chemical, and biological
- Mounting options: vertical or horizontal in compatible aquarium setups
Best Uses for the Fluval U4
The U4 is best suited to larger aquariums that need a powerful internal filter with flexible flow output. It can be used as the main filter in compatible aquariums within its rating or as an additional circulation and polishing filter in larger systems where extra in-tank water movement is helpful.
Official Fluval U Series Video
Setting Up the Fluval U4 Underwater Filter
Rinse the included media, install the filter fully submerged in the desired vertical or horizontal position, and select the output direction that best matches the aquarium. Clean foam and poly/carbon media regularly, and rinse biological media in removed aquarium water to help preserve beneficial bacteria.
What’s Included
- Fluval U4 Underwater Filter
- 2 foam filter pads
- 2 poly/carbon pads
- BIOMAX biological media
Shipping Info
Shipping Info
FREE SHIPPING OVER $119!*
- does not apply to livestock -
$11.99 FLAT RATE FOR LESS THAN $119.00 - CANADA WIDE!
*EXCEPTIONS:
- Any heavy or bulky items will incur a 100% charge of the actual shipping cost (valid for both Canada and the US). Heavy bulky items include (but are not limited to): salt, dry rock, sand, chillers, sumps, aquariums, stands, and some filter media.
- Frozen or perishable food can only be shipped via UPS Express. We have discounted the express shipping of these items to help the hobbyist out.
- Livestock is covered by a different shipping policy. To view the policy and further information regarding shipping livestock, click here.
GENERAL NOTES:
- We always make our best effort to ship your order via the carrier chosen during the check-out process; however, for some multi-piece shipments and/or remote destinations, we must reserve the right to use another carrier at our discretion (and without prior notice). If you require notice of any changes made to the carrier, please mention it in the special instructions during check-out.
- Upon request, we will ship your dry goods as per your specifications (courier, airlines, on your account, etc.).
- Quoted rates are the carriers live discounted shipping rates after adjusting for any/all shipping promotions.
Returns / Exchanges
Returns / Exchanges
Return Policy — Aquarium Equipment & Supplies
- All returns and/or exchanges must be made within 30 days of receipt of product.
- Before returning or exchanging any goods, you must contact J&L Aquatics to obtain a Return Merchandise Authorization (RMA). Items returned without prior authorization will be declined.
- Returned items must be unused, in original packaging, in as-new condition, and in perfect sellable condition. All returns are subject to inspection upon receipt.
- A 15% restocking fee applies to all online returns. This fee includes the cost of outbound shipping.
- Customer is responsible for return shipping costs on standard returns.
- Order cancellations made before shipping are not subject to a restocking fee.
Non-Returnable Items
- Special order items
- Clearance / final sale items
- Open box items
Regular sale items (non-clearance) are returnable within the 30-day return window, subject to our standard return conditions.
Defective, Warranty & DOA Items
- If you receive an item that is defective, not working, or dead on arrival (DOA), please contact us as soon as possible.
- Confirmed defective and warranty returns have no restocking fee and no Affirm fee. Customer does not pay return shipping — J&L Aquatics will provide a prepaid return label.
- All defective claims are subject to inspection. Items showing signs of customer damage, improper installation, or misuse are not covered under warranty.
Carrier Damage & Lost in Transit
- If your order arrives damaged by the carrier or is lost in transit, please contact us right away with:Photos of the damaged product (if applicable)Photos of the damaged box/packaging (if applicable)A description of the issue
- Important — Do not throw out any packaging! Please keep all original packaging, boxes, and packing materials. These are required to process your claim. Discarding packaging may affect our ability to resolve your claim.
High-Value Items ($100+)
- For items valued at $100 or more, customers must provide a return tracking number before a replacement will be shipped.
Affirm & Financing Orders
- Affirm or similar financing orders that are cancelled or returned in-store are subject to a 5% service charge. This covers the processing fee charged to us by the financing provider.
- The Affirm service charge does not apply to confirmed defective or warranty returns.
J&L Aquatics strives to maintain the lowest prices economically possible. In most cases we have the lowest price in the Canadian marketplace, but in the rare occasion that we do not, please feel free to contact us at 604-444-1161 or through e-mail to discuss an opportunity to price match.
