The Tier1 DGD-5005-20 comparable spun polypropylene filter cartridge features a dual-gradient density design with a 5-micron nominal rating. The outer layer captures larger sediment particles while the denser inner core traps finer particles down to 5 microns, effectively reducing dirt, sand, silt, rust, and scale from your water supply. This graduated density extends the cartridge life significantly compared to standard single-density filters.

The Tier1 DGD-5005-20 spun polypropylene cartridge typically lasts 3 to 6 months, depending on water quality, sediment levels, and usage volume. For households with heavier sediment loads or higher water consumption, replacement may be needed closer to the 3-month mark. We recommend replacing the cartridge when you notice a drop in water pressure or every 6 months at minimum to maintain optimal filtration performance.

This 20-inch Big Blue-style cartridge fits most standard 20" x 4.5" whole-house filter housings, including Pentek #155358, DGD-5005-20, and compatible systems. The replacement kit includes a compatible O-ring and silicone lubricant, ensuring a proper, leak-free seal when installed in your existing housing. Always verify your housing dimensions (20" length x 4.5" diameter) before installation.

The Tier1 replacement kit includes one DGD-5005-20 comparable dual-gradient spun polypropylene filter cartridge, one replacement housing O-ring, and a packet of food-grade silicone lubricant. The O-ring and lubricant are essential for maintaining a watertight seal between the filter housing sump and cap, preventing leaks and ensuring consistent system performance during every cartridge change.

The Tier1 DGD-5005-20 comparable cartridge is manufactured from 100% pure polypropylene materials tested to NSF/ANSI Standard 42 for materials safety, ensuring no harmful contaminants leach into your water. The cartridge is designed for sediment reduction in whole-house applications and is safe for use with municipal and well water supplies. It operates effectively across a temperature range of 40°F to 125°F.