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how to backflush a pool filter

Author: Poolking - Swimming Pool Equipment Manufacturer

How to Backflush a Pool Filter

Introduction:

Pool filters are an essential component of your swimming pool system. They help to clean the water and ensure that it stays clear and free of debris. However, over time, the filter can become clogged with dirt and other particles, reducing its effectiveness. This is where backwashing or backflushing comes in.

What is Backflushing?

Backflushing refers to the process of cleaning out the filter by forcing water through it in the opposite direction. This dislodges any dirt or debris that has become trapped in the filter and flushes it out of the system. This process should be done on a regular basis to keep your pool water clean and healthy.

When to Backflush?

There are a few signs that your pool filter needs to be backflushed, including:

1. Poor water circulation and flow

2. Reduced suction or pressure at the pool skimmer or return jets

3. Cloudy or murky pool water

4. Excessive debris on the pool floor or in the skimmer

If you notice any of these signs, it is time to backflush your pool filter.

Step by Step Guide to Backflushing:

1. Turn off the pool pump and the heater. This is important to prevent any damage to the system.

2. Locate the backwash valve on your filter. This is usually located on the top or side of the filter tank.

3. Attach a backwash hose to the backwash valve. This hose should be long enough to reach a proper drainage area.

4. Turn on the pump and set it to the backwash mode.

5. Open the backwash valve and allow the water to flow out of the backwash hose. You should see dirty water flowing out of the hose.

6. Continue to run the pump and backwash the filter until the water flowing out of the hose becomes clear.

7. Turn off the pump and close the backwash valve.

8. Rinse the filter by setting the pump to the rinse mode. This will flush out any remaining dirt or debris from the filter.

9. Turn off the pump and close the backwash valve.

10. Turn on the pump and return the filter to its normal setting.

Tips for Backflushing:

1. Backwash your filter once a week during peak swimming season or when you notice a decrease in water flow.

2. During backwashing, monitor the pressure gauge on your filter. When the pressure drops to a certain level, it is time to backwash.

3. Do not over-backwash your filter as this can cause damage to the system.

4. Make sure that the backwash hose is directed away from any sensitive areas, such as gardens or flower beds.

5. It is also a good idea to clean out the skimmer basket and pump strainer basket after backwashing to ensure that the system is clear of debris.

Conclusion:

Backflushing your pool filter is a necessary part of maintaining a clean and healthy swimming pool. By following the simple step-by-step process outlined above, you can ensure that your pool water stays clear and free of debris. Remember to backwash your filter regularly and monitor the pressure gauge to ensure that your system is functioning properly. With a little bit of effort, you can enjoy a crystal clear pool all season long.

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Poolking’s sand filter warranty is 3 years for fiberglass filter,2 years for plastic filter.During the warranty period,if the filters parts have any damage,we can judge the factors according to the photos or videos, then we can offer free parts to replace. If the filters are damaged badly,we will provide a new one.
The pumps and lights are 1 year warranty,the method is same as filters.
a.Firstly you can tell me the pool size such as wide, length and depth.The circulation period is 4 hours,then we can use the pool volume divide by 4 to know the flow rate.Based on this we can know choose the suitable model for sand filter and pump.
b.Usually 4 meters can install a pool light.Both ends of the pool can install the ladders.
The basic filtration equipment can be chosen like above method.The other accessories can be fixed according to the using environment and requirement.
After about 5~10days ,or when the reading of the pressure gauge on the pump side of the filter has increased by about 0.2bars since the last backwash , backwash the filter as follows:
1. Stop the pump
2.Close the valves on the suction and return lines.
3.Open the cover of the pump and empty the filter gasket .
4.Refit the cover
5.Open the valve to the drain outlet
6.Turn the lever to BACKWASH
7. Open the valves to the suction and return lines.
8.Start the pump .Rinse the filter for about 1 to 2 minutes until the water in the sight glass is clear .
NOTE : Any electric heater must be off .
9. Stop the pump
10. Turn the lever to RINSE , start the pump and rinse for about 15~30 seconds. Stop the pump and turn the lever to FILTER . This is the normal operating position .
11. Close the drain outlet valve and start the pump . Switch on the electric heater if any .
Poolking’s Horizontal Sand Filters in Singapore Zoo
Singapore Zoo is covering an area of 28.3 hectares. Natural scene in the parkinstead of fences, creating a natural living environment for all kinds of animals. Thereare about 3000 animals running free and living peacefully with tourists. It has beeninstalled more than 40 nos POOLKING's stacking horizontal sand filters in Sea Lion,Manatee Penguin hall . POOLING is the first manufacturer in China to produce
stacked horizontal sand filter.
a. Power failure or motor protection tripped
b. Pump doesn't vent
c. Pump doesn't fill the water
d. Suction line/hose leaking
e. Transparent cover not properly installed - check filter basket - even bolts
f . Inlet suction process is too large g.) Total resistance loss exceeds the allowable range of the pump - recalculate the required pressure
h. Mechanical shaft seal leakage
---Poolking has a professional Quality Control team to guarantee each product is 100% inspected before packing. For example when the filter inner tank comes out, they will make a first water testing before bobbin wounding. After installation all the connections or manhole & sightglass, they will make the second water testing. During the packing procedure, QC team will inspect all the details like wounding, neck, internal resin and so on to make sure no leaking and without flaw.
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Contact: Sandy

Email: sandy@poolking.co

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