It is important to change the PBW4 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.
4 sq. ft. | 4-1/4 in. x 4 in. | Top & Bottom End Cap (Inside Diameter) 2 AS SOLD AS 5 SETS OF PAIRS
Note: It is standard for measurements to vary by as much as 1/8 in.
type d, wm3779, wm-3779, wm 3779, sand n sun, pbw4, pbw 4, pbw-4, pleatco pbw4, pleatco pbw 4, pleatco pbw-4, unicel c4313, unicel c 4313, unicel c-4313, c4313, c-4313, c 4313, fc3753, fc 3753, fc-3753, filbur fc3753, filbur fc-3753, filbur fc 3753