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The Filbur FC-2190 is the replacement filter for the Purex 1722840 R.
Guaranteed to fit or your money back!
The Purex 1722840 Comp. Pool & Spa Filter Cartridge has a diameter of 7 inches, and a length of 18 7/16 inches. This Purex pool filter has both an open top and bottom, and each has a diameter of 2 3/8 inches. This pool filter replacement will keep the water in your pool or spa clean and clear.