The 5231JA2002A filter helps to clean your water of impurities and make it healthier for you and your family. The OEM LG replacement filter has been tested and certified to meet NSF/ANSI Standard 42, meaning it has been certified to reduce chlorine levels in your water. The aftermarket Swift Green replacement is made from an eco-friendly process and is a cheaper, more affordable alternative to the OEM. The Supco replacement filter is our lowest priced option. Don’t let the price fool you, though. The Supco is a great alternative to the OEM as it purifies your water for a fraction of the price of the OEM. Each of the different models all have the same flow rate and share very similar features. The primary difference between the filter brands is price and NSF/ANSI rating, though many filters that are not NSF/ANSI certified are still constructed from NSF/ANSI rated parts.