It is important to change the PD40SL-4 pool filter cartridge when the fibers of the pleats become worn, and difficult to clean. A clean pool filter cartrige is necessary for clean, sparkling, healthy swimming pool water.
40 sq. ft. 7 in. x 9-1/8 in. Top End Cap (Lock-In Posi-Grip® Handle) Bottom End Cap (1-1/2 in. Tapered Nipple)
Note: It is standard for measurements to vary by as much as 1/8 in.
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