Poolpure focuses on bringing great technologies and products to the market that truly provide the cleanest water filtration possible for the health, safety and happiness of every pool and spa owner. How to find a replacement cartridge for your pool or spa? If you already know your filter cartridge's part number or the replacement number, you can use the search the part number on our product page to quickly confirm whether the filter is compatible. If you do not know the replacement part number for your cartridge, then choosing the right cartridge can be accomplished by measuring your existing one. Use the following steps as a guide: 1. Measure the outside diameter of the cartridge in inches (+/- 1/16th inch) 2. Measure cartridge length from end cap to end cap (+/- 1/16th inch). Exclude any handles or extensions. 3.
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