How To Backwash Sand Filter

Are you a novice pool owner and have been recommended to use pool filters by an expert for cleaning purposes? If so, there are chances you might not be familiar with how to backwash sand filter. Don’t worry; I got your back.

Backwashing your sand filter is a simple process of connecting a backwash hose to your filter and using the backwash setting. This sends pool water through the filter, flushing out impurities to the waste port. Pretty simple, right? Let’s see how to do it.

Proper Way to Backwash A Sand Filter

  1. Switch off the pool pump.
  2. Rotate the filter valve handle to the “Backwash” position and lock it fully.
  3. Once the water going through the sight glass on the filter is clear, turn on the pump and backwash for two minutes.
  4. Switch off the pump.
  5. Ensure to lock the handle in place after turning the filter valve handle to the “Rinse” position.
  6. Once the pump runs, you should let the rinse cycle continue for a minute, or at least when the water in the sight glass is clear.
  7. Now switch off the pump.
  8. Lock into place and reset the filter valve to “Filter.”
  9. Finally, you can switch on the pump.

Why Should You Backwash your filter?

Why Should You Backwash your filter

By backwashing, you reverse the flow of water through the filter, dislodging and flushing out trapped particles. This process helps restore the filter’s efficiency, improves water circulation, and ensures your pool remains clear and contaminant-free.

Moreover, how often you should backwash your filter depends on the condition of your filter and the amount of sand they are letting in.

Key Takeaways:

  • Backwash your filter with your pressure gauge’s reading raised to 10PSI or above.
  • You require extra water for backwashing filters. Just backwash until the sight glass’s water runs out clear.
  • Backwash your pool for around two minutes with a maximum of 1,000 liters of water every two weeks.
  • Always switch off the pump before moving or resetting the filter valve setting.

Wrap Up:

In a nutshell, learning how to backwash a sand filter is essential for pool owners to maintain clean and clear water. But not a big deal; by following the step-by-step guide provided, you can quickly and effectively remove impurities and debris from your filter system.

Remember to check the pressure gauge regularly and backwash when necessary to ensure optimal performance. Feeling frustrated in maintaining your pool in optimal condition? Check out all your pool-related queries at!