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  • Pool Tip - How To Backwash A Filter

  • The following backwash instructions are general backwashing instructions for the most common types of Hayward pool filters. Please check with your pool filter manufacturer for specific backwashing instructions.

  • How To Backwash A Sand Filter

    1. Roll out backwash hose and/or open backwash valve. (if you have one)
    2. Turn off pool pump.
    3. Move multiport handle to the "backwash" position.
    4. Turn on the pump and run for two minutes.
    5. Turn off the pool pump and move multiport handle to "rinse" position.
    6. Turn on the pump and run for twenty seconds.
    7. Repeat steps #2- #6 two more times.
    8. Turn off the pool pump
    9. Move multiport handle to the "filter" position.
    10. Roll up backwash hose and/or close backwash valve. (if you have one)
    11. Turn the pool pump back on.

    Helpful Hints

    • Note the pressure on your sand filter's pressure gauge after you backwash. This is your starting pressure. When the gauge reading is 10 psi higher than your starting pressure, it is time to backwash.
    • If your pool water is clear, backwashing a sand filter should probably be required every 3-4 weeks, depending on the size of your filter and pool.
    • DO NOT MOVE THE HANDLE ON THE MULTIPORT UNLESS THE POOL PUMP IS OFF, OTHERWISE YOU CAN DAMAGE YOUR FILTER SYSTEM.

  • How To Backwash A Cartridge Filter

    1. Turn off pool pump.
    2. Remove filter cartridge from filter cannister.
    3. Rinse off paper element with a garden hose. Agood nozzle on the hose will work better. Try to clean element thoroughly.
    4. Install clean cartridge element back into filter cannister securely.
    5. Turn on pool pump.

    Helpful Hints

    • Note the pressure on your cartridge filter's pressure gauge after you backwash. This is your starting pressure. When the gauge reading is 10 psi higher than your starting pressure, it is time to backwash.
    • Pools with cartidge filters may require backwashing once a week depending on the size of your filter and pool.
    • Cartridge filter elements generally last one season. Check with your local pool professional concerning replacement and acid washing the element.

  • How To Backwash An Extended Cycle DE Filter (Bump Handle)

    1. Roll out backwash hose and/or open backwash valve. (if you have one)
    2. Turn off pool pump.
    3. Slowly bump handle on top of filter up and down 20 times.
    4. Turn on pool pump and run for two minutes.
    5. Turn off pool pump
    6. Slowly bump handle on top of filter up and down 20 times.
    7. Turn on pool pump and run for two minutes.
    8. Turn off pool pump
    9. Slowly bump handle on top of filter up and down 20 times.
    10. Turn on pool pump and run for two minutes.
    11. Turn off pool pump
    12. Roll up backwash hose and/or close backwash valve. (if you have one)
    13. Turn the pool pump back on.
    14. Remove skimmer basket from skimmer closest to the pool filter.
    15. Slowly add the proper amount of D.E. powder to the skimmer.
    16. The D.E. powder will travel through the pipes and back into the filter.

    Helpful hints

    • Note the pressure on your D.E. filter's pressure gauge after you backwash. This is your starting pressure. When the gauge reading is 10 psi higher than your starting pressure, it is time to backwash.
    • If your pool water is clear, backwashing a D.E. filter should probably be required every 3-4 weeks, depending on the size of your filter and pool.
    • DO NOT BUMP OR MOVE THE HANDLE ON THE FILTER UNLESS THE POOL PUMP IS OFF, OTHERWISE YOU CAN DAMAGE YOUR FILTER.
    • D.E. filters require acid washing every 2-3 years. Call your local pool professional if you think your D.E. filter might need one.

  • How To Backwash A DE Filter (Multiport)

    1. Roll out backwash hose and/or open backwash valve. (if you have one)
    2. Turn off pool pump.
    3. Move multiport handle to the "backwash" position.
    4. Turn on the pump and run for two minutes.
    5. Turn off the pool pump and move multiport handle to "rinse" position.
    6. Turn on the pump and run for twenty seconds.
    7. Repeat steps #2- #6 two more times.
    8. Turn off the pool pump
    9. Move multiport handle to the "filter" position.
    10. Roll up backwash hose and/or close backwash valve. (if you have one)
    11. Turn the pool pump back on.
    12. Remove skimmer basket from skimmer closest to the pool filter.
    13. Slowly add the proper amount of D.E. powder to the skimmer.
    14. The D.E. powder will travel through the pipes and back into the filter.

    HELPFUL HINTS

    • Note the pressure on your D.E. filter's pressure gauge after you backwash. This is your starting pressure. When the gauge reading is 10 psi higher than your starting pressure, it is time to backwash.
    • If your pool water is clear, backwashing a D.E. filter should probably be required every 3-4 weeks, depending on the size of your filter and pool.
    • DO NOT MOVE THE HANDLE ON THE MULTIPORT UNLESS THE POOL PUMP IS OFF, OTHERWISE YOU CAN DAMAGE YOUR FILTER SYSTEM.
    • D.E. filters require acid washing every 2-3 years. Call your local pool professional if you think your D.E. filter might need one.