How to CLEAN AND BACKWASH a HAYWARD ec-40 & EC-50 DE Filter

1

Turn on the filter system and gradually add 4 pounds of Diatomaceous Earth (D.E.) for the EC40 model or 5 pounds of D.E. for the EC50 model into the skimmer while the filter is running. Add the D.E. slowly to ensure it properly coats the Flex Tubes inside the filter tank. A slight decrease in water flow returning to the pool is normal during this process.

Alternatively, you can use Jack’s Magic Filter Fiber Stuff in place of Diatomaceous Earth (D.E.). One pound of Filter Fiber equals two pounds of Diatomaceous Earth. Plus, it’s an eco-friendly choice.

2

The Hayward EC40 filters approximately 2,400 gallons per hour, while the EC50 filters about 2,800 gallons per hour. To maintain clean water, the pool’s total volume should circulate through the filter at least twice per day (Refer to the Pool Gallon Chart below for guidance). During periods of hot weather or heavy swimming activity, you may need to run the filter for a longer duration to keep the water cystal clear.

3

When the return water flow decreases or the pressure gauge rises about 10 PSI above normal, it’s time to regenerate the filter.
1. Turn off the filter.
2. Slowly push the bump handle down, then quickly up.
3. Repeat this up-and-down motion three times.
4. Turn the filter back on.

Please note: If bumping the handle does not restore normal pressure, it’s time to perform a backwash.

4

Backwashing removes dirt, debris, and D.E. from the filter by reversing the water flow.
1. Turn off the filter.
2. Slowly push the bump handle down, then quickly up. Repeat this motion eight times.
3. Open the drain plug or the ball valve at the bottom of the tank and allow water to drain until it runs clear.
4. Close the drain plug or turn the ball valve to the closed position and return to Step 1 to restart the filter with fresh D.E.