Genuine P3-3 replacement pre-filter protects your PE-3 system with high-capacity 0.5-micron sediment filtration, capturing fine rust, sand, and cysts before water reaches the main carbon block.

By removing particulates first, this pre-filter extends PE-3 cartridge life, maintains flow rate, and keeps your dual-stage system performing at its peak for under-sink point-of-use purity.

Designed for quick-change installation on the PE-3 bracket, the P3-3 pre-filter is recommended every 1,500 gallons or one year on municipal water, or more often where sediment loads are high.