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How to Change Out Filter Cartridges, Properly and Safely

Filter cartridges are used in almost all liquid processes to remove solid and microbial contaminants from water and other liquids. Changing out filter cartridges is an essential maintenance task for any filtration system. Doing this safely and adequately is critical to ensure the longevity and efficiency of your system.

Whether you have a single-round vessel or multi-round vessel filtration system, here is a step-by-guide on how to change out filter cartridges and when you should change filter cartridges.

How to change out or replace a cartridge filter in a single cartridge vessel?

Before starting the cartridge change-out process you will need a few things: the new cartridge, a wrench or pliers, a drip tray or bucket, a rag, and lubricant. Depending on the liquid you may need to wear PPE for safety such as gloves and glasses. Once you have the required tools you are ready to follow the steps below:

Step 1: Make sure the system is turned off and depressurized. Depressurize the system by opening the air release valve.

Step 2: Place a drip tray or bucket underneath the sump to collect excess liquid.

Step 3: Remove the sump. Either by twisting it off, twisting the ring nut, or removing clamps depending on the configuration. You may need a wrench or pliers to do this.

Step 4: Remove the old filter cartridge. Be careful, the sump and old filter may contain excess liquid.

Step 5: Clean the housing: Use a clean cloth or rag to wipe down the inside of the vessel and remove any debris or residual liquids.

Step 6: Ensure your new cartridge is correct and install the new cartridge. Insert the new filter cartridge into the vessel, and ensure it is seated, sealed, and secured. Make sure the filter o-ring or gasket is in place, you may need lubrication.

Step 7: Replace the sump and tighten it you may need a wrench or pliers. Make sure it is snug but not over-tight, ensure it is on straight.

Step 8: Purge air from the system: Open a faucet or valve and let the system run for a few minutes.

Step 9: Test the system: Ensure it works properly and liquid flows at desired flow rates.

If you have any additional questions on single-round vessel change-out contact an expert at Global Filter, we will be happy to help you out.

How to change out or replace cartridge filters on a multi-round cartridge vessel?

Before starting the process you will need a few things: the new cartridges, a flathead screwdriver, a rag, a bucket, and lubricant. Depending on the liquid you may need to wear PPE for safety such as gloves and glasses. Once you have the following you are ready to follow the steps below:

Step 1: Turn off and depressurize the system. Open a vent valve or vent plug on the top of the vessel.

Step 2: Open the dirty and clean drain valves and place your bucket under each. Allow for the excess liquid to flow out.

Step 3: Loosen the eyebolts on top of the vessel and remove the lid, you may have to use a flathead to do this. Each eyebolt will flip down.

Step 4: Check the vessel o-ring for any deformities or damage to ensure a leak-tight seal.

Step 5: Remove the top cover plate by loosening the wing nut. Be careful as you do not want the wing nut to fall into the vessel. Global Filter’s vessels are designed to prevent this.

Step 6: Remove the cartridge filter springs/holders if necessary and be careful none fall into the vessel.

Step 7: Remove old filter cartridges. Be careful, they can be heavy, messy, or dangerous depending on the liquid.

Step 8: Inspect the inside of the vessel for corrosion and clean out the inside.

Step 9: Insert the filter springs/holders into the new cartridges. Insert the new cartridges into the vessel and ensure they are aligned and sealed properly. Global Filter vessels are designed to align cartridges when installed.

Step 10: Reinstall the alignment plate on top of the cartridges and ensure filter springs/holders are in the proper holes. Tighten the wingnut by hand, it should apply pressure to hold filters in place.

Step 11: Clean and lubricate vessel o-ring, replace the lid, and screw into place. Use the wrench or flathead to tighten the screws in a cross pattern. Do not over-tighten!

Step 12: Close the dirty and clean valves.

Step 13: Purge any air out of the system by opening a faucet or valve and letting it run.

Step 14: Close the air vent valve and test the system. Ensure that it is working properly and flows at desired rates.

When to change out filter cartridges?

Knowing when to change out your filter cartridges is essential to maintaining the efficiency and effectiveness of your filtration system. The frequency at which you need to change out your filter cartridges will depend on a variety of factors, including the type of system you have, the quality of the liquid you are filtering, the level of filtration required, and your production process. However, here are some general guidelines to follow:

  • Change out the filter cartridges every 6-12 months: Most manufacturers recommend changing out filter cartridges every 6-12 months, even if they appear to be in good condition.
  • Check the pressure gauge: If your filtration system has pressure gauges, check them regularly. When the differential pressure starts to rise above the normal operating range, it’s time to change out the filter cartridges.
  • Check the flow rate: If you notice a decrease in the flow rate of your water, it may be a sign that the filter cartridges are clogged and need to be changed.
  • Inspect the filter cartridges: Check the filter cartridges regularly for signs of wear and tear, such as cracks, tears, or disintegration. If you notice any damage, it’s time to change out the filter cartridges.

Following these steps, you can easily know when and how to change out your filter cartridges for single-round and multi-round vessels. Remember to always follow the manufacturer’s instructions and use proper tools and safety equipment to ensure a safe and efficient filter change-out. 

If you still have questions, feel free to contact a Global Filter expert by clicking here.