Fluval Max-Flo 16500 Waterfall & Filter Pump 16,500L/h

The Fluval Max-Flo 16500 Waterfall & Filter Pump is a powerful submersible pond pump designed for larger pond filtration systems, waterfalls, streams and watercourses.

Delivering a maximum flow of 16,500 litres per hour, the Max-Flo 16500 provides substantial water movement for larger garden ponds and fish ponds where dependable continuous circulation is required.

The Max-Flo's solids-handling design allows suitable suspended pond debris to pass through the pump and travel towards an external filtration system. This makes it particularly effective as the main circulation pump in a pond filtration setup.

Key Features

• Powerful 16,500L/h maximum flow
• Designed for larger garden and fish ponds
• Ideal for external pond filtration systems
• Excellent for waterfalls, streams and watercourses
• Fully submersible pond pump
• Solids-handling design
• Helps transport suspended debris towards the pond filter
• Large protective outer strainer cage
• Large intake area helps maintain consistent water flow
• Designed for continuous pond operation
• Convenient hose connection system
• Suitable for freshwater ponds
• Ideal for high-flow pond applications

Powerful Pond Filter Pump

The Fluval Max-Flo 16500 is particularly well suited to larger pond filtration systems where substantial water turnover is required.

Rather than using a fine pre-filter that can quickly become clogged with pond debris, the Max-Flo design allows appropriately sized suspended material to pass through the pump.

The debris is then transported with the water towards the external pond filter, where it can be captured and removed during filter maintenance.

This makes the Max-Flo 16500 particularly useful for fish ponds, where reliable circulation and effective waste transport are important for maintaining good water quality.

Ideal for Large Waterfalls & Streams

With a maximum output of 16,500L/h, the Max-Flo 16500 is also an excellent choice for larger waterfalls, streams and watercourses.

The substantial flow allows you to create stronger water movement and more impressive pond features than would be possible with a smaller pump.

Remember that 16,500L/h is the maximum pump output. The actual amount of water reaching your waterfall will depend on the installation.

Flow can be reduced by:

• Vertical pumping height
• Hose length
• Hose diameter
• Bends and fittings
• Valves
• Pond filters
• Other plumbing restrictions

Using appropriately sized pond hose is particularly important with a high-flow pump to avoid unnecessarily restricting performance.

Solids-Handling Design

The Max-Flo incorporates a large protective outer cage that helps prevent oversized material from reaching the impeller while allowing suitable suspended debris to enter the pump.

This design makes the pump particularly useful for filtration applications because debris can be moved away from the pond and towards the external filter rather than simply accumulating around the pump intake.

Build a Complete Pond Filtration System

The Fluval Max-Flo 16500 can form the circulation component of a complete pond filtration system.

Water is pumped from the pond to an appropriately sized external filter, where mechanical and biological filtration can take place before the filtered water is returned to the pond.

A suitable Fluval Pressure-Flo Pond Filter can be incorporated into the system, while a Fluval Jet Clear water clarifier can provide additional assistance where green pond water is a problem.

Specifications

• Brand: Fluval
• Range: Max-Flo
• Model: 16500
• Pump Type: Waterfall & Filter Pump
• Maximum Flow: 16,500L/h
• Installation: Fully submersible
• Water Type: Freshwater
• Applications: Pond filtration, waterfalls, streams and watercourses
• Design: Solids-handling pond pump
• Operation: Designed for continuous pond circulation

Choosing the Correct Pond Pump

When selecting a pond pump, the maximum flow rating is only one part of determining the correct model.

For pond filtration, consider:

• Total pond volume
• Fish stocking level
• Required water turnover
• Filter capacity
• Vertical pumping height
• Hose length and diameter
• Plumbing restrictions

For waterfalls and streams, also consider the desired width and depth of water flowing over the feature.

Actual pump output will decrease as head height and plumbing resistance increase.

Maintaining Your Max-Flo 16500

Regular maintenance helps maintain strong water flow and reliable pump operation.

Periodically inspect and clean the:

• Outer pump cage
• Pump intake
• Impeller
• Impeller shaft
• Impeller chamber
• Pond hose
• Connections and fittings

If water flow decreases noticeably, check these areas for debris or restrictions before assuming that the pump requires replacement.

Frequently Asked Questions

What is the flow rate of the Fluval Max-Flo 16500?
The Max-Flo 16500 delivers a maximum flow of approximately 16,500 litres per hour.

Can I use the Max-Flo 16500 with a pond filter?
Yes. The Max-Flo range is designed specifically for applications including external pond filtration.

Is it suitable for a large waterfall?
Yes. Its high flow makes it suitable for larger waterfalls, streams and watercourses when correctly sized for the installation.

Does it handle pond debris?
Yes. The Max-Flo is a solids-handling pump designed to allow suitable suspended pond debris to pass through the pump and travel towards the external filtration system.

Is the Max-Flo 16500 submersible?
Yes. It is designed for submerged operation in freshwater ponds.

Will I get 16,500L/h at my waterfall?
Not necessarily. The stated flow is the maximum pump output. Actual flow decreases with vertical pumping height, hose length, fittings, filters and other restrictions.

Explore Fluval Pond Products

Looking for more equipment for your pond? Explore our complete range of Fluval 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