PondXpert Variflow Strainer+

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PondXpert VariFlow Strainer+ Pond Pumps

Adjustable Submersible and Dry Mount Variable Flow Pumps

The PondXpert VariFlow Strainer+ range is designed for pond owners who want flexible installation and full control over water flow. These variable flow pond pumps combine the advanced electronic control of the original VariFlow series with a built in strainer cage, allowing them to be used as traditional submersible filter pumps or installed dry in gravity fed systems.

Available in 5000, 10000 and 20000 litre per hour models, the VariFlow Strainer+ range covers small ornamental ponds through to large koi ponds. This makes them ideal for garden ponds, wildlife ponds, waterfall systems, pressure filters, drum filters and advanced filtration setups.

Unlike fixed speed pumps, VariFlow Strainer+ models allow you to adjust the flow rate using the digital controller. This means you can increase output during warmer months when oxygen demand is higher and filtration systems are under more pressure. In winter, you can reduce the speed to maintain circulation while significantly lowering energy consumption.

The integrated strainer cage makes installation simple for submersible use. The cage protects the impeller from debris and allows the pump to sit directly in the pond. If required, the cage can be removed so the pump can be run dry, provided it is positioned below pond water level. This flexibility makes the range suitable for both traditional ornamental pond owners and more advanced koi keepers.

Energy efficiency is a key advantage. Depending on the model, wattage adjusts in line with the selected flow rate, helping you take control of electricity costs. The pumps are also capable of handling solid particles up to 6 mm, reducing the risk of blockages and minimising maintenance.

With strong maximum head heights and multiple outlet size options, the VariFlow Strainer+ range offers dependable circulation for raised filters, waterfalls and long pipe runs. Backed by a 3 year manufacturer guarantee, these pumps provide reliable and adjustable performance for modern pond systems.

Key Benefits

  • Adjustable variable flow control

  • Built in strainer cage for submersible use

  • Can be run dry in gravity fed systems

  • Energy efficient variable wattage operation

  • Suitable for ornamental ponds and koi ponds

  • Ideal for waterfalls, filters and circulation systems

  • Handles solid particles up to 6 mm

  • Strong head height performance

  • Digital control unit for precise adjustment

  • 3 year manufacturer guarantee

Technical Features Across the Range

  • Flow rates from approximately 2,800 lph up to 20,000 lph

  • Adjustable wattage depending on selected output

  • Maximum head heights up to 7.5 metres

  • 10 metre total power cable with 3 metre lead to controller

  • Multiple outlet sizes for flexible pipe connections

  • Submersible or dry installation capability

Frequently Asked Questions – PondXpert VariFlow Strainer+ Pond Pumps

What is a PondXpert VariFlow Strainer+ pump?

The PondXpert VariFlow Strainer+ is a variable flow pond pump with a built in strainer cage. It allows you to adjust the water flow rate using a digital controller while also giving you the option to install the pump submersed in the pond or run it dry in a gravity fed system.

What makes the Strainer+ version different from the standard VariFlow?

The key difference is the integrated strainer cage. This allows the pump to be used as a traditional submersible pond pump straight out of the box. If required, the cage can be removed so the pump can be installed dry in a gravity fed filtration setup.

Can the VariFlow Strainer+ pump run dry?

Yes. The pump can be run dry provided it is positioned below pond water level to ensure a constant water supply. This makes it suitable for gravity fed filter systems and more advanced koi pond installations.

Can it be fully submerged?

Yes. With the strainer cage attached, the pump is designed to sit directly inside the pond as a submersible pump. The cage protects the impeller from debris and allows water to pass through while handling solids up to 6 mm.

What pond sizes are these pumps suitable for?

The VariFlow Strainer+ range includes models suitable for small ornamental ponds through to large koi ponds. Flow rates range from approximately 2,800 litres per hour up to 20,000 litres per hour depending on the model selected. Always match the pump to your pond volume, fish stock level and required head height.

How does the variable flow control work?

Each pump includes a digital controller that allows you to increase or decrease the flow rate. This means you can run the pump at a higher setting in summer to improve oxygen levels and filtration performance, and reduce the output in winter to lower electricity consumption.

Are VariFlow Strainer+ pumps energy efficient?

Yes. Because the wattage adjusts according to the selected flow rate, you only use the power required for your pond at any given time. This makes them more economical than many fixed speed pond pumps.

Can I use this pump for a waterfall?

Yes. These pumps are ideal for waterfalls and raised returns. The adjustable flow means you can increase the waterfall effect when desired and reduce it at night to lower noise levels.

What is the maximum head height?

Maximum head height depends on the model, with larger versions capable of lifting water up to around 7.5 metres. Always check the individual model specification to ensure it meets your installation requirements.

How often should the pump be cleaned?

Cleaning frequency depends on pond conditions and fish stocking levels. Because the pump handles solid particles up to 6 mm, maintenance is generally reduced compared to smaller impeller pumps. Regular inspection every few weeks is recommended.

Are these pumps suitable for koi ponds?

Yes. Larger VariFlow Strainer+ models are well suited to koi ponds, especially where adjustable circulation is beneficial. They can be used to feed drum filters, bead filters or pressure filters depending on flow requirements.

Do these pumps come with a guarantee?

All PondXpert VariFlow Strainer+ pumps come with a 3 year manufacturer guarantee for added peace of mind.