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1. Measure the outside diameter of the filter cartridge in inches.
2. Measure the length of the filter cartridge from end cap to end cap. Do not include things like handles or threaded bottoms in the measurement.
3. Identify the end cap configuration. Is it threaded with a handle, or open on both sides? Look at the pictures below to help you better identify the end cap. If it is open measure the inner diameter of the hole.
4. To better identify the cartridge, count the number of pleats. This allows us to know the square footage of the cartridge in question.

• When the pressure gauge on your filter tank reaches 8 p.s.i. above the pressure recorded when a new cartridge is installed, or when there is a noticeable decrease in the pressure coming from your return jets, it is time to clean your cartridge.
• Remove the cartridge from the filter canister and dislodge loose debris by directing a stream of water from a garden hose between each pleat. Do not use a high-pressure car wash wand or a stiff brush to clean your cartridge. These abrasive methods may damage the filter media.
• Soak the cartridge in a commercially prepared cartridge cleaner to remove oils or other organics. If stubborn stains persist, soak the cartridge overnight in a solution of one-quart household bleach to five gallons of water.
• Rinse the cartridge thoroughly with clean fresh water and return it to the filter tank. Secure the tank lid and restart your filtration system per manufacturer's instructions.
• Always follow your filter equipment manufacturer's instructions when removing or reinstalling your filter cartridge. Always exercise extreme care when handling bleach or any other chemical. We recommend against acid washing your filter cartridges.