How to Clean Pool Filters – Easy & Effective Tips

Welcome to our comprehensive guide on how to clean pool filters. Proper maintenance of your pool’s filtration system is crucial for keeping your pool water clean and safe for swimming. Over time, pool filters can become clogged with debris, dirt, and other contaminants, which can reduce their effectiveness. Regular cleaning of pool filters is essential to ensure that your pool remains crystal clear and free from harmful bacteria. In this guide, we will walk you through the step-by-step process of cleaning pool filters to help you maintain a pristine swimming environment.

Types of Pool Filters

Before we delve into the cleaning process, let’s first understand the different types of pool filters commonly used in swimming pools:

Filter Type	Description
Sand Filters	These filters use sand as the filtering medium to trap debris and contaminants.
Cartridge Filters	Cartridge filters contain a pleated polyester filter cartridge to capture impurities.
DE (Diatomaceous Earth) Filters	DE filters use diatomaceous earth powder to filter out even the smallest particles.

Step-by-Step Guide to Cleaning Pool Filters

Now, let’s walk through the process of cleaning pool filters based on the type of filter you have:

1. Cleaning Sand Filters

• Turn off the pool pump.
• Turn the multiport valve to the “backwash” position.
• Turn on the pump and let it run until the water in the sight glass is clear.
• Turn off the pump and set the valve to “rinse” for 30 seconds.
• Turn off the pump and return the valve to the “filter” position.
• Add new filter sand every 5-7 years as needed.

2. Cleaning Cartridge Filters

• Turn off the pump.
• Release the pressure from the system by opening the air relief valve.
• Remove the cartridge from the filter housing.
• Rinse the cartridge with a garden hose to remove debris.
• Soak the cartridge in a filter cleaner solution overnight.
• Rinse the cartridge again and reinstall it in the filter housing.

3. Cleaning De Filters

• Backwash the filter to remove debris.
• Open the filter tank and remove the grids or fingers.
• Hose off the DE powder from the grids/fingers.
• Inspect the grids/fingers for damage and replace if necessary.
• Add new DE powder according to the manufacturer’s instructions.
• Reassemble the filter and restart the system.

Tips for Maintaining Clean Pool Filters

Here are some additional tips to help you maintain clean pool filters and ensure optimal filtration performance:

• Check and clean your pool filters regularly, especially during peak swimming season. If you don’t know how often should you clean the pool filter then check our previous article.
• Monitor the pressure gauge on your filter and backwash or clean the filters when the pressure rises 7-10 psi above the normal operating level.
• Use a filter degreaser to remove oils and greases that can clog filters.
• Keep the area around your pool clean to prevent debris from entering the pool and clogging the filters.
• Consider scheduling professional pool filter cleaning services at least once a year for a thorough maintenance check.

Frequently Asked Questions

Q: How often should I clean my pool filter?

A: The frequency depends on the type of filter and pool usage. Typically, cartridge filters should be cleaned every 2-6 weeks, sand filters every 1-2 months, and DE (diatomaceous earth) filters every 1-3 months.

Q: What are the different types of pool filters?

A: The main types are cartridge filters, sand filters, and DE filters.

Q: How do I know when my pool filter needs cleaning?

A: Signs include decreased water flow, higher pressure readings on the filter gauge, cloudy water, and the pool filter running more frequently than usual.

Q: How do I clean a cartridge filter?

A: 

• Turn off the pool pump.
• Open the filter housing and remove the cartridge.
• Rinse the cartridge with a hose to remove debris.
• Soak the cartridge in a filter-cleaning solution if needed.
• Rinse thoroughly and allow it to dry before reinstalling.

Q: How do I clean a sand filter?

A: 

• Turn off the pool pump.
• Set the filter valve to the “Backwash” position.
• Turn the pump back on and let it run until the water in the sight glass is clear.
• Turn off the pump, set the valve to “Rinse,” and run for about 30 seconds.
• Set the valve back to “Filter” and turn the pump on.

Q: How do I clean a DE filter?

A: 

• Turn off the pool pump.
• Open the air relief valve to release pressure.
• Remove the filter grids or fingers and hose them off.
• Soak in a filter-cleaning solution if needed.
• Rinse thoroughly and reassemble.
• Add the appropriate amount of DE powder through the skimmer.

Q: What type of cleaning solution should I use for filter cartridges and DE grids?

A: Use a filter-specific cleaning solution or a mixture of one part muriatic acid to twenty parts water. Always follow the manufacturer’s recommendations.

Q: Can I use household cleaning products to clean my pool filter?

A: No, household cleaning products can damage the filter materials and introduce harmful chemicals into your pool.

Q: How do I backwash a sand or DE filter?

A: 

• Turn off the pool pump.
• Set the multiport valve to the “Backwash” position.
• Turn the pump on and backwash until the sight glass shows clear water.
• Turn off the pump and set the valve to “Rinse.”
• Run the pump for 30 seconds, then set it back to “Filter.”

Q: How do I know if my filter is damaged and needs replacement?

A: Signs include visible tears or cracks in cartridges or grids, sand in the pool for sand filters, and persistent high pressure even after cleaning.

Q: How long do pool filters typically last?

A: Cartridge filters last 1-2 years, sand filters last 5-7 years, and DE grids last 1-3 years, depending on maintenance and usage.

Q: Can I clean my pool filter with a pressure washer?

A: It’s not recommended as the high pressure can damage the filter media. Use a garden hose with a spray nozzle instead.

Q: How do I reassemble the filter correctly after cleaning?

A: Follow the manufacturer’s instructions carefully. Ensure all components are clean and dry before reassembly to prevent leaks and ensure proper function.

Final Words

Cleaning pool filters is an essential part of pool maintenance to ensure clean and safe swimming water. By following the step-by-step cleaning process outlined in this guide and incorporating the maintenance tips provided, you can keep your pool filters in top condition and enjoy a sparkling pool all year round. Remember, a well-maintained pool filtration system not only improves water clarity but also prolongs the life of your pool equipment. Happy swimming!