Fluval Pressure-Flo 4500 Pressurised Pond Filter with 13W UVC

The Fluval Pressure-Flo 4500 is a pressurised pond filtration system designed to provide effective filtration and water clarification for garden and fish ponds up to approximately 4,500 litres.

Combining mechanical filtration with an integrated 13W UVC clarifier, the Pressure-Flo helps remove suspended waste while controlling the free-floating algae responsible for green pond water.

Its pressurised design provides flexibility when positioning the filter around your pond and allows filtered water to be returned to the pond, waterfall or another suitable return point.

Key Features

• Suitable for ponds up to approximately 4,500 litres
• Integrated 13W UVC clarifier
• Pressurised pond filtration system
• Mechanical filtration using multiple filter foams
• Helps capture suspended pond waste and debris
• UVC helps control free-floating algae
• Helps improve green pond water and overall water clarity
• Convenient external installation
• Integrated easy-clean system
• Cleaning indicator
• Mode selector for filtration and cleaning
• Drain outlet for easier maintenance
• Universal Click-Fit hose connections
• Suitable for freshwater garden and fish ponds
• Recommended for use with the Fluval Max-Flo 2400 Waterfall & Filter Pump

Mechanical Pond Filtration

Pond water enters the Pressure-Flo and passes through its filter foams, which capture suspended dirt, organic debris and other particles before the water is returned to the pond.

Removing this material helps improve water clarity while reducing the amount of visible waste continuously circulating through the pond.

Because the filter is installed outside the pond, routine maintenance is also more convenient than filtration systems that need to be removed from the water for cleaning.

Integrated 13W UVC Clarifier

The Fluval Pressure-Flo 4500 includes an integrated 13W UVC clarifier.

UVC treatment helps control the microscopic free-floating algae responsible for turning pond water green.

As pond water passes through the system, exposure to UVC helps control these suspended algae, allowing the filtration system to assist in producing clearer pond water.

Easy-Clean Filtration System

One of the major advantages of the Fluval Pressure-Flo design is its convenient cleaning system.

The filter incorporates cleaning handles, foam cleaning blades, a mode selector and drain outlet, allowing accumulated waste to be flushed from the filter with less need to dismantle the entire unit during routine maintenance.

This can be particularly useful in fish ponds, where filter foams can accumulate substantial amounts of organic waste.

Recommended Pump – Fluval Max-Flo 2400

For a correctly matched Fluval pond filtration system, the recommended pump for the Pressure-Flo 4500 is the Fluval Max-Flo 2400 Waterfall & Filter Pump.

The Max-Flo 2400 delivers up to 2,400L/h and is designed to transport pond water and suspended debris towards the Pressure-Flo, where the water can be filtered and clarified before being returned to the pond.

Fluval Max-Flo 2400 Waterfall & Filter Pump – View Product

Actual filtration requirements can vary depending on fish stocking levels, sunlight exposure, pond conditions, plumbing and pumping height.

Pressurised Filter Design

Because the Pressure-Flo operates as a sealed pressurised filter, it provides greater flexibility when planning your pond installation.

The filter can be positioned externally and incorporated discreetly into landscaping while keeping the lid, controls and connections accessible for maintenance.

Filtered water can then be directed back towards the pond or an appropriately designed waterfall or watercourse.

Specifications

• Brand: Fluval
• Range: Pressure-Flo
• Model: 4500
• Product Number: PT8350
• Filter Type: Pressurised pond filter
• Maximum Pond Capacity: 4,500L
• Dimensions: 28.3 cm diameter × 36 cm high
• Canister Volume: 10L
• UVC: 13W
• Recommended Pump: Fluval Max-Flo 2400
• Recommended Pump Flow: 2,400L/h
• Maximum Operating Pressure: 0.04 MPa / 0.4 bar / 5.8 PSI
• Filtration: Mechanical filtration with UVC clarification
• Cleaning System: Integrated backwash cleaning system
• Cleaning Indicator: Yes
• Drain Outlet: Yes
• Mode Selector: Yes
• Installation: Above ground or partially buried
• Application: Freshwater garden and fish ponds

Choosing the Correct Pressure-Flo

The 4,500 litre rating represents a maximum pond-sizing guide. The actual filter capacity required can vary considerably depending on the individual pond.

Filtration requirements may increase with:

• Heavy fish stocking
• Koi and other high-waste fish
• High feeding levels
• Strong sunlight exposure
• Warm conditions
• Large amounts of leaves or organic debris

For more demanding ponds, selecting a larger filtration system can provide additional filtration capacity.

Maintenance

Regular maintenance is important for maintaining good water flow and filtration performance.

The Pressure-Flo's integrated cleaning system simplifies routine foam cleaning, but the filter should still be periodically inspected and maintained.

The UVC lamp and quartz sleeve should also be checked and maintained to ensure the clarifier continues operating effectively.

Frequently Asked Questions

What size pond is the Fluval Pressure-Flo 4500 suitable for?
The Pressure-Flo 4500 is rated for ponds up to approximately 4,500 litres. Actual requirements depend on fish stocking, sunlight and other pond conditions.

Does the Pressure-Flo 4500 include a UVC?
Yes. It incorporates an integrated 13W UVC clarifier to help control free-floating algae and green pond water.

Does the Pressure-Flo 4500 include a pond pump?
No. The pond pump is purchased separately.

Which pump is recommended for the Pressure-Flo 4500?
The recommended matching pump is the Fluval Max-Flo 2400 Waterfall & Filter Pump, providing up to 2,400L/h.

View the Fluval Max-Flo 2400 Pump

Will the Pressure-Flo 4500 help with green pond water?
Yes. The integrated UVC is designed to help control the free-floating algae responsible for green water.

Can the filter be cleaned without completely dismantling it?
Yes. The Pressure-Flo incorporates an integrated cleaning mechanism, mode selector and drain outlet to make routine cleaning easier.

Can I use the Pressure-Flo 4500 for a fish pond?
Yes. It is designed for freshwater garden and fish ponds. Heavily stocked ponds may require greater filtration capacity than the basic pond-volume rating suggests.

Explore Fluval Pond Products

Looking for more equipment for your pond? Explore our complete range of Fluval Max-Flo pond pumps, Pressure-Flo filters and Jet Clear water clarifiers to help build or upgrade your pond filtration system.

View the Full Range of Fluval Pond Products