should i turn my pool filter off when it rains


Author: PoolKing - Pool Sand Filter Manufacturers


Pools are a luxurious addition to any home. They provide an excellent relaxation spot and are an excellent location for socializing, exercise, and cooling off during warm weather. However, pool maintenance can be daunting for most homeowners, and one of the commonly asked questions is whether pool filters should be turned off when it rains. This article aims to answer the question and provide insightful information on the matter.

The Effect of Rainwater on Pool Filters

Rainwater is essential for people and the environment. However, it can affect the chemical balance of your pool water, making the pool water cloudy, unbalanced and prone to algae growth. The rain carries organic contaminants, minerals, and debris that can accumulate in the pool over time. Additionally, large rainstorms can overflow the pool's water, making the debris and contaminants flow into the pool filter.

When should you turn off the pool filter when it rains?

1. During heavy rainstorms.

Heavy rainstorms can cause massive debris accumulation in the skimmer basket and the pool filter. Turning off your pool filter during the downpour can save your equipment from heavy debris accumulation. However, after the storm has passed, it's recommended to clean out the skimmer basket and turn on the pool filter to remove the remaining debris and bacteria.

2. When the pH level is unbalanced.

The pH level of pool water should be between 7.2 and 7.8. Rainwater can make pool water acidic due to the presence of carbon dioxide in the atmosphere, making the pool water unbalanced. When the pH level becomes too low, it can corrode your pool equipment and cause skin irritation. You can turn off the pool filter while adjusting the pH level, but it's essential to keep the pool water sanitized.

3. When you're treating your pool water.

If you're treating your pool water with chemicals or shock, turning off the pool filter can be recommended. This is because the pool filter can trap the chemicals, which can corrode the equipment over time.

4. When pool maintenance is being carried out.

Pool maintenance, such as cleaning the pool, skimming leaves and debris, and brushing the walls and floor, can require turning off the pool filter to avoid mechanical interactions with the cleaning tool. After pool maintenance is completed, it's essential to turn on the pool filter to remove any remaining debris and bacteria.

5. When you're not using the pool.

When you're not using the pool, turning off the pool filter can save you money on the energy bill. However, it's essential to turn the pool filter on at least once a day for at least one hour to prevent bacteria and debris accumulation in the pool and pool filter.


In summary, it's not recommended to turn off your pool filter during rainfall in most cases. However, there are instances when it can be necessary, such as during heavy rainstorms, when the pH level is unbalanced, when the pool is being treated, during pool maintenance and when you're not using the pool. Turning off the pool filter for periods longer than necessary can make the pool water unbalanced, cloudy and prone to algae growth. It's essential to strike a balance between conserving energy and maintaining clean pool water.


Just tell us your requirements, we can do more than you can imagine.
Send your inquiry

Send your inquiry

Choose a different language
Current language:English