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The Watts 20" String Wound Filter is a 20 micron water filter cartridge made of FDA grade polypropylene fibers that will reduce sediment, sand, dirt, rust, and other impurities in your water. This Watts water filter (SF20-20) offers excellent chemical compatibility and high dirt holding capacity, all at an economical price. This string wound filter is made of FDA grade polypropylene and is suitable for potable water as well as industrial use.
Watts string wound filters are compatible replacement filters that fit water filter housings which require standard sized 20" water filters (20" x 2 1/2").
The Watts SF20-20 polypropylene string wound filter is also commonly known as a PP filter cartridge.
Watts SF20-20 String Filter Cartridge:
Filter life depends on water quality and usage. This Watts filter should be changed when a decrease in pressure is noticed.