Frequently Asked Questions

Frequently Asked Questions to Help Find the Right Rotorflush Products for your ApplicationFrequently Asked Questions about Rotorflush self cleaning filter products

In order to meet your filtration requirements, we need as much information as possible. Therefore, we need to know about the water quality you have. We need to know where you will use the filter or filterpump.   And we also need to know how far and how high you are pumping the water,  as well as the flow rate you require. The Frequently Asked Questions below will help us determine which submersible filter pump,

Our Frequently Asked Questions that we might ask you below will help us determine what’s best for you. They help us find which submersible filterpump, self-cleaning pump inlet filter or suction strainer is best suited for your needs.

Your Frequently Asked Questions that you might ask Rotorflush will help you to decide which filtration options are available. They help you to find out what our products will and won’t filter.

To help us and you we have listed the questions most frequently asked of us, and the basic information we would like from our customers about the use they wish to get from our products.

These are only a guide, talking to us is by far the best way to get the right Rotorflush for you!

Questions that you might ask Rotorflush

  1. Can the filter system operate non-stop 24/7?
    • All our filter systems are designed for continuous use in all conditions. This is what makes the Rotorflush range of industrial filters unique. We recommend the use of some form of dry run protection – float switches and electronic controls – to ensure that changing conditions do not affect the performance of the pumps.


  2. Will the filters cope with rubbish such as plastic bags?
    • The principal of the self-cleaning filter is a continuous cycle of blowing away material blocking the filter with a small amount of filtered liquid, in between drawing in large amounts of filtered liquid. If a large object such as a plastic bag was to be sucked onto the surface of the filter then this will normally be removed from the screen by the backwash jets.


  3. Where does the solid matter go, that is filtered out?
    • The filters leave the solids in the water you are pumping from. Put another way the filters extract a filtered supply from the dirty water. We do have solutions if you wish to retain the solids that are filtered out – call us to discuss.


  4. Will the filters extract water from sludge?
    • No, they won’t. As a rule of thumb, they work in water with some solids, not in solids with some water. The water to be filtered still has roughly the same viscosity as water. Once it becomes more viscous than water they are not suitable.


  5. Do you do one-offs or adapt your equipment for specific applications?
    • Yes- we have worked with a number of companies to provide bespoke equipment to solve their filtration problems


  6. Are your products guaranteed?
    • Yes, we give a 1-year guarantee on products incorporating an electric motor and 3 years on all other industrial products.


  7. If the motor fails on a Filterpump do I have to buy a whole new pump?
    • Normally we can repair it, which is much cheaper than buying a whole new pump.


  8. Are Rotorflush products suitable for Seawater?
    • The RF400A, RF600R, (Filters for surface mounted pumps) and the Analyser Filter system are fine in sea water, other products will work in sea water but their life may be shortened.


  9. What are the prices?
    • Prices start from around £750.00. As there are many options on the products please ring with your requirements and we can normally email you a quote within a few hours.


  10. Do you export to overseas customers?
    • Yes, we often export.


Questions that we might ask you

  1. What is the application?
    • Pumping what fluid from where to where?


  2. Are there suspended solids in the fluid?
    • If so, what type of solids, e.g sewage, sand, weed please specify.


  3. What temperature is the fluid?
    • Maximum and minimum temperature


  4. How finely do you need to filter?
    • If not known, what equipment do you need to protect from suspended solids, e.g. valves and nozzles.


  5. What is the aperture size of the nozzles?
    • minimum aperture size in the system


  6. What flow rate do you need?
    • e.g. litres/second, litres/minute, cubic metres/hour, gallons/minute etc.


  7. What pressure do you require from the pump?
    • e.g. pounds/square inch, bars etc.


  8. Do you have an existing surface mounted pump?
    • If so does it have any surplus capacity to power a self cleaning filter? (they normally use 15-25% of the pump’s output).


  9. Electricity Supply?
    • If you need a submersible pump, do you want the motor to be single phase three phase, 230v or 110v, 50 Hz or 60Hz?



What are Rotorflush’s Lead Times and Delivery

Our filter pumps are made to order, and we would expect to deliver within 7 – 10 working days from receipt of orders. We will advise for bespoke items.

Carriage is extra and is dependent on the weight and size of the goods.

Lead Time and Delivery – RF A & R Series

Our filters and strainers are made to order and we would expect to deliver within 14 – 21 working days from receipt of orders for the smaller RF A and RF R series products. The larger RF600 series strainers have a six week lead time from receipt of order.  We will advise for bespoke items.

Carriage is extra and is dependent on the weight and size of the goods.