Pentair Sta-Rite System 2 PLM100 100 sqft Cartridge, 13-5/8" Dia x 18-3/8" is built for maintaining the correct fit, seal and function within compatible Sta-Rite System 2 filter applications. Restoring filter media with the correct cartridge helps improve water clarity, flow rate and service efficiency. Cartridge filters gradually collect oils, debris and fine particles that can restrict water movement. Replacing the cartridge with the correct System 2 element helps return the filter to a cleaner operating range, improves flow through the tank and supports more predictable maintenance intervals. Helps restore filtration surface area and water clarity Sized for the listed Sta-Rite System cartridge application Useful for pressure rise, short cycle or reduced flow service Verify square footage and dimensions before installation Use the listed part number (27002-0100S) as the primary compatibility reference, then compare the physical p