Backwashing a pool: Know it well!


The swimming pool comes with lots of pleasure-giving aspects and some hassles. You can minimize all the irritating inconveniences by getting a complete understanding of pool care and maintenance. Backwashing a pool is one of the many pool-care methods that are necessary for healthy swimming.

What is Backwashing a pool?

Backwashing is not a complex procedure of cleaning, it is simply the cleaning of the pool filter.  We reverse the flow of water to remove contaminations from the filter. This process is carried out until the water is clear.

What are the signs that your filter needs backwashing?


There is no specific period that you can set as backwash delay, but some common signs indicate the requirement for backwashing.

An increase in pressure requires Backwashing a pool filter

When you notice an increased water pressure (per square inch) reading, it is most probably the indication that there is a blockage in your filter due to dirt.

Reduced flow of water:

Reduced water pressure is also a sign of a dirty filter. The dirty filter condenses the flow of water in your pool.

Cloudy water: 

The unclear water can be due to any reason, but a dirty filter can also be one of them. Your filter needs backwashing when water is cloudy.

How often should you backwash your pool?

It always depends on the frequency of your pool use that how often you backwash it. Conveniently, you can set the backwash routine once a week. The filtration system quality is also a big cause, affecting the backwash delay.

Sometimes, your swimming pool’s location causes the filter to clog. If there are trees near the pool, wind-blown materials gather on the surface and in the base. This large accumulation of material causes the filter to get dirty soon, and you need an urgent backwash.

Backwashing is also required after a sudden storm or algae breakout. Schedule it according to the requirement of the nearby environment of your pool.

There are some different criteria for backwashing if you have a diatomaceous earth filtration system for your pool. It involves the cleanliness of six times per year for best performance.

How to backwash?

You should well aware of the method of cleaning the pool filter. Your pool filter does a lot for the quality of water for swimmers. It picks up all the debris from the water and it only requires a little effort from your side to work with efficiency. Here are the steps that you should carry out for cleaning the filter.

  1. Turn the filter off, you don’t need to keep it working more.
  2. Connect the wastage port of your filter with the backwash hose.
  3. Set the backwash valve to push or pull, the water will flow through the equipment.
  4. Keep the handle on the backwash position.
  5. Backwash until you have crystal clear water.
  6. Stop the backwashing and set all the equipment to its previous position.
  7. Wait for the proper flow of water, and keep the air relief valve on, when the water starts flowing, you can turn off it.


How long should you backwash your pool?

It is enough to backwash your pool for 2 to 3 minutes. Sometimes, you need a little more. You can witness the clarity of the water from the valve glass, if it is sufficiently clear, backwashing is complete.

The bumping process:

The bumping process is the procedure of several backwashing to remove dirt and D.E (diatomaceous earth). You can remove more debris accumulated by the bumping process. The D.E powder is added through the skimmer, a chemical level is maintained throughout the procedure.

Backwashing a pool too often:

When backwashing is done too often, it will cause loss of your swimming pool water. It is mandatory to stop backwashing when the water gets clear. Backwashing your pool too much can cause many other problems. It can reduce the ability of the filter to sieve small particles. Remember to keep your frequency of washing according to the frequency of use.

Where does the backwash water go after Backwashing a pool?

When you backwash a pool, it leaves the backwash hose and reaches wherever the backwash hose exit is lying, if you direct it to the sewerage system, it will nowhere spread.

When should you never backwash a pool?

Yes, there are some situations when you have to avoid backwashing. When there are algae appearance in the pool, it will easily pass through the filter system and will back to the water by backwashing. In this situation, vacuum the pool and remove the algae.

Points to remember when backwashing your pool:

  • Turn off the pump before running the backwash. If the pump remains on during the backwashing, it can cause high-cost damage to your pool.
  • Always remember to stop backwashing when the water is clear. Observe it.
  • Make sure that sand doesn’t go to the water again, for this, set it up on a certain level in your filter.
  • Take care of the backwash valve. Keep them clean and add lubricants to their base, they will turn easily.
  • Take care of all parts of the filter system. If there is any damage, repair it immediately.

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