How Our Self-Cleaning Filters Work

How Our Self-Cleaning Filters Work to keep Filter Mesh Clear in Dirty Water

It is no mystery how our self-cleaning filters work. The same self-cleaning mechanism keeps the filter mesh clear on all our products. Our submersible filter pumps with their built-in self-cleaning intakes produce a continuous backwash to the filter mesh whenever they run. Our self-cleaning filters take a backwash flow from the filtered output of your surface mounted pump to keep their mesh clear. Here’s how:

 Find out ow our self-cleaning filters work in submersible pumps wiith built-in self-cleaning filtersSubmersible Pumps with Integral Self-Cleaning Filters

Every ½ second the self-cleaning Rotorflush filter built onto our submersible pumps is cleaned completely. This keeps any solids away from the filter screen, preventing them entering the pump and beyond. The automatic backwash keeps the filter screen clean and free from debris without interrupting the filter output. The very efficient self-cleaning action allows fine filter meshes to be fitted without fear of blockage.  Pumps, filters and any upstream nozzles and valves are protected from blockage and damage.

How our self-cleaning filters work in filterpumps

Traditional pumps are fitted with a coarse intake screen which will only keep out the larger particles. If there are many solids in the water these screens often block, starving the pump of water and needing frequent cleaning. Not so with the Rotorflush self-cleaning system for filters and filterpumps. Watch this to see how it works.




The self-cleaning part of the filter consists of a rotating housing that has two angled jets. The blue arrows show the main flow of water. This water flows through the filter screen and up into the main pump. The red arrows show filtered water inside the filter being sucked into the impeller and ejected out through the rotating jets. These angled jets direct water back through the filter removing any detritus that is beginning to block the screen and also making them rotate at 60 rpm.


Self-cleaning Filters and StrainersHow our self-cleaning filters work with surface mounted pumps

Our self-cleaning filters and strainers, whatever their size, all work on the same basic principles – from the smallest pond and analyser filters up to the largest 1500 cubic metres per hour filters.
Rotorflush filters do not rely on a separate power source or motor to drive their effective self-cleaning mechanism.

These filters are designed for the suction side of surface mounted pumps; thus, as long as the pump is running Rotorflush self-cleaning filters will keep their filter mesh clear.

How our self-cleaning filters work with dry mounted pumps

The pump draws water through the filter mesh. The filtered water is and pumped out from the pump for your use. The self-cleaning filter is back washed by taking a tee off the clean water output of your pump.  Our unique and patented self-cleaning filter mechanism is driven by a proportion of filtered water sent back to the filter.

The jets inside the filter gently remove debris, suspended solids and aquatic life away from the filter mesh without impeding the flow of water through the filter. Simple!


Please Note: Our filters are designed for use in dirty water or liquids with a viscosity close to that of water. Our filters and filterpumps are NOT suitable for use in raw sewage or any other dirty water which contains oils or fat.