Pentair S7M120 Inner/Outer Filter Cartridge Package - 300 Square Feet filter-length_18 9/16 inches When pH levels drop

When pH levels drop

Its Track Start wedge adjusts to five positions to accommodate a range of starting preferences

Some engineers require this to be done every foot (depending on job specs)

The specifications will work with Hayward SPX1520Z1ESC

Pentair S7M120 Inner/Outer Filter Cartridge Package - 300 Square Feet filter-length_18 9/16 inches When pH levels dropThis is a package of Pentair 170145 Inner and Outer Cartridge Filter Elements for System 3 S7M120 Filters. It has a media area of 100 Square Feet for Inner Cartridge and 200 Square Feet for the Outer Catridge. Cartridges are made of superior reinforced polyester pleated material with polyurethane end caps. Pentair reusable cartridge filter elements provide a high degree of water clarity and longer filter cycles. To maintain your pool water cleanliness