How to Backwash a Pool Filter?

There are many forms of pool maintenance. The water level should be consistently high. The water level may increase or decrease due to rain and heat. In that situation, your pool can be severely affected. It’s important to maintain a constant water level to ensure your pump is working effectively.

If the pump is too high, it cannot pull foreign objects into the swimming sock or paddle. If this continues, your pool will look more like a swamp than its original state.

Back-washing is a pool service used only to sand or (DE) filters when the manometer shows a pressure increase by 8 to 10 pounds above the initial clean pressure or flow. If you drastically reduce the filter, it will get dirty, and you will have to wash the filter in the pool.

Pulling the thrust valve’s piston up or down, it reverses the direction of the water entering and leaving the filter. Here we have the word “anti-wash” because we direct the water back through the pool filter.

Backwashing is a mandatory aspect of swimming pool maintenance. During the back-washing process, your pool water will decrease. Once you have back-washed, the pools ensure to check the level and if it needs to be filled up, simply use your hose pipe to fill it up to the level.

Even your Kreepy Krawley can affect the level. A rule of thumb to avoid issues is always keeping an eye on the water; if it is too high, you can do a back-wash, too low, fill it up with water from your hose.

The actual anti-washing process is terminated when the system’s operating pressure increases between 6 and 10 PSI. The washing time depends on the residues in the filter. We encourage adding water to the pool and rinsing for 3-5 minutes to remove the smallest filter from the system. You can return to the pool for a new filter or sand filter.

For the rest of the conditions, the step is to go back and forth on the timer and look at the side mirrors attached to the back sight mirror. With the vision function, you can watch the water as it comes out of the filter.

With the preview, you can see the water removing dirt from the filter. This should take one to three minutes, depending on the debris in the filter. You should continue to wash until the water on the screen is clear, as this indicates that dirt has left the filter.

Checking the filter gauge’s operation, turn off the pipe, and you will see the filter gauge drop to zero. If the filter pressure gauge has not been completely disconnected, it’s replaced as it will no longer be calibrated and may provide incorrect pressure readings across all pressure ranges.

Due to the low cost of replacing the filter gauge, it’s encouraged you replace the gauge if you are unsure of its condition or accuracy.

Observe the system’s net pressure; the best way to determine when after washing is necessary is to wait for the pressure in the filter to rise from 6 to 10 PSI above the cleaning pressure. You exceed 30 PSI.

While newer have a maximum pressure of 50 PSI, anything above 30 PSI is very high. If you have a high-pressure filter, you may want to invest more to decrease the force. The pressure under your system

Whenever you want to use a filter to specify when to clean the filter, ensure the filter measures well. These filters are known to fail and can be pressed higher than you accidentally found the filter. This can damage the filter and, at worst, can be dangerous.

To check that the filter gauge is working, turn off the plumbing, and you will see that the filter gauge drops to zero. If the filter pressure gauge is fully reduced to zero, its replaced as it is no longer in calibration and can provide incorrect pressure values across all pressure ranges.

Due to the low cost of replacing the filter, it is encouraged to replace the gauge if you are unsure of its condition or accuracy.

The actual back-wash process is completed when the system’s operating pressure increases by 6 to 10 PSI. The wash time depends on how dirty the filter is. For new filters or new sand filters, its recommended adding water to the pool and rinsing for 3 to 5 minutes to remove sand from the smaller filter in the system you can return to the pool.

The best practice is to operate your filters in the cleaning settings. This is half the time you just cleaned up before returning the filters to the Filter setting. This will remove some debris from the filter head and remove any debris that returns to the pool.

For all other conditions, the best way is to go back and forth on the stopwatch and look at the side mirrors attached to the back wash door. With this screen function, you can see the water as it comes out of the filter.

You can clearly see the water through the preview while the residue is removed from the filter. This should take one to three minutes, depending on how dirty the filter is. You should continue to wash until the water on the screen is clear, as this indicates that the debris has been removed from the filter.

 Back-washing tips

  • Washing can cause water loss. Although it is inevitable, you can reduce the amount of water loss without much of the back-washing. Look at the color of the water through the glass and stop as soon as it’s visible.
  • During the anti-wash, you will need to wash the sand with rubbish and will require you to fill the amount with sand in the filter. To reduce the amount of sand blown back into the pool, run the filter in the wash setting for a minute when you refill it.

When is back-washing required? 

  • Pool cleaning is critical to the maintenance and responsibilities associated with pool ownership. You should try to clean the pool if you detect something looking dirty or not working efficiently. You should also ensure to clean defoamers, vacuum the pool, clean the tiles, and clean the pump.
  • Always keep in mind to lean your pool after having a common swim with friends

If possible, clean defoamers daily. Depending on how close your pool is to the trees, you will clean the defoamers only a few times a week. However, you will quickly discover that you will severely wash the pool if you do not clean the defoamer.

You will also find that your deformer and the pipes leading to the pump chamber can easily clog hair, leaves, and other substances, causing your filter system to stop working.

You need to empty once a week. Some people recommend it twice a week. But it ended up giving a lot of work. If your pool is close to a lake or trees, you may need to increase this number. Vacuuming will remove leaves and other debris that start to work within your pH level.

The tiles should be cleaned weekly. However, this is another time-consuming task. When clean the tiles every few weeks, no one will blame you. The pump must be thoroughly clean twice in a season. It includes manually operating the pump for cleaning. Back-washing can be done by the pressure seen on the pump. If you get too high as you are 40 years old, you need to get back as soon as possible.

When should your cartridge filter be replaced?

There is no backwash valve on the cartridge filter, as the filter cartridge in the current pool is not designed for backflow. However, when the pump turn off, the fan opens to drain the water from the tank, remove the cap, remove the cartridge from top to bottom and replace it.

This is a regular service to keep the filter clean. Its recommend you replace your filters every year. As the filter age, the time between the necessary cleaning and the filter will decrease to keep the water clean and prevent it from turning green faster.

When changing the filter settings, you must turn off the pump before adjusting the filter settings—changing the filter settings while the pump runs may damage the filter and damage or remove the spout seal on the filter head. In this case, the water comes out along the anti-wash and slowly flows out of the pool.


It’s important to keep your pool clean to avoid algae and regular seepage and keep your pool looking its best. This is just a guideline. If you think you need to clean your pool more often, keep cleaning and backwashing the pool. The cleanest is when it comes to the pool.

Taking care of your pool is also very important. It promotes a healthy safe swimming life.



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