The Harmsco PP-S-1 is a 1-micron nominal pleated polypropylene sediment filter cartridge. It is specifically engineered to capture fine particulates such as silt, sand, rust, and scale from your water supply. The 1-micron rating makes it an excellent choice for applications requiring high-efficiency sediment removal, including pre-filtration for reverse osmosis systems and point-of-entry whole-house filtration.

The Harmsco PP-S-1 cartridge is designed to fit Harmsco Poly-Pleat single-cartridge filter housings, including models such as the HB-series and HIF-series housings that accept the standard 9-3/4" length cartridge. Its pleated polypropylene construction ensures a secure fit within Harmsco housings and provides maximum surface area for extended service life compared to standard string-wound or melt-blown cartridges.

The service life of the Harmsco PP-S-1 depends heavily on incoming water quality and flow demand, but most users replace this cartridge every 3 to 6 months. Heavy sediment loads or high-usage applications may require more frequent changes. A noticeable drop in water pressure or visible discoloration of the pleats is a clear indicator that the PP-S-1 has reached the end of its useful life and should be replaced.

Yes, the Harmsco PP-S-1 is constructed from 100% FDA-compliant polypropylene media and components, making it safe for use in potable water applications. The cartridge is built without adhesives, binders, or surfactants that could leach into your water supply, ensuring pure sediment reduction without introducing contaminants. This makes the PP-S-1 suitable for residential, commercial, and food-service water filtration systems.

The Harmsco PP-S-1 pleated polypropylene cartridge supports a maximum flow rate of up to 10 GPM (gallons per minute) depending on the housing configuration, with a maximum operating temperature of 145°F (63°C). Its rigid pleated design resists collapse under pressure differentials and provides consistent filtration performance throughout its service life, making it ideal for demanding sediment reduction applications.