Sta-Rite 250220201S Large Outer Pool Replacement Filter For S7M120 SM 3 Series

Keep your pool water clean all summer long with the Sta-Rite Large Outer Pool Replacement Filter For S7M120 SM 3 Series. This replacement filter covers 200 square feet of the filtration area and fits the Sta-Rite System 3 SM-Series 21-inch pool and spa cartridge filter model S7M120. Made out of quality materials for superior performance as it filters your swimming pool, this pool cartridge filter is reliable and durable. Signs of a weakening filter include high PSI, frayed or ripped fabric, or other visual damages to the filter itself. Most filters need replacing every 1-2 years, higher use and increased chemicals in the pool water will mean a shorter life. Your water will look crystal clear each and every swim with this Sta-Rite replacement filter.