Pentek 20-Inch Big Blue Sediment Filter Cartridge DGD-5005-20 — 20 x 4.5, 5 Micron Dual-Gradient Polypropylene

Pentek Pentair DGD-5005-20 is a 20" dual-gradient density sediment cartridge that captures dirt, sand, silt and rust for whole-house protection without changing water taste or odor.

This replacement cartridge is spun from 100% pure polypropylene and engineered for heavy-duty, point-of-entry filtration. Its dual-gradient fiber packing increases effective filter depth and dirt-holding capacity so you get longer service life and minimal pressure loss compared with standard sediment cartridges. Designed to fit 20" Big Blue and other 20" x 4.5" housings, it provides a reliable nominal 5 micron barrier for residential, rural and light commercial systems.

How does the dual-gradient design improve filtration performance?

The cartridge layers fibers progressively tighter from the outside to the center, creating a depth filter that traps particles throughout the media rather than only on the surface. That construction boosts dirt-holding capacity and reduces clogging, which helps preserve flow and extend replacement intervals.

• Dual-gradient structure increases effective filter depth by 233% compared with uniform media.
• Up to three times the dirt-holding capacity of comparable cartridges.
• Low pressure drop under 1 psi at 20 gallons per minute to maintain house plumbing flow.

Will this cartridge fit my existing system and plumbing needs?

The DGD-5005-20 measures 20" x 4.5" and is manufactured to drop into any 20" Big Blue or similar heavy-duty housing. It replaces any standard 20" x 4.5" sediment cartridge, making it a straightforward swap for most whole-house pre-filter setups.

• Standard 20" x 4.5" dimensions for broad compatibility with Big Blue housings.
• Nominal 5 micron rating suitable as a pre-filter ahead of carbon filters or water softeners.
• Works with residential, municipal, well and commercial inlet conditions.

What materials and certifications back up product safety and compatibility?

The cartridge is made from 100% pure spun polypropylene, selected for chemical compatibility and to avoid imparting taste, odor or color to treated water. Independent testing and certification ensure it meets recognized material standards for consumer water products.

• Spun polypropylene construction resists chemical degradation and leaching.
• Tested and certified to NSF/ANSI Standard 42 for material requirements.
• Rated for use up to 145°F, suitable for most household hot- and cold-water applications.

How often should I replace the cartridge and what performance can I expect?

Replacement intervals depend on inlet water quality and household water use, but a typical guideline is about every six months. Replace sooner if you notice reduced flow, visible sediment, or changes in downstream filter performance.

• Nominal 5 micron rating for sediment reduction while allowing high flow.
• Recommended replacement roughly every six months under normal conditions.
• Monitor pressure differential and water clarity to determine exact timing.

Who is this for: The Pentek Pentair DGD-5005-20 is aimed at homeowners, landlords, rural property owners and light-commercial operators who need a robust pre-filter to protect plumbing, appliances and downstream treatment stages. It suits anyone using 20" Big Blue or equivalent housings who wants a long-lasting, NSF-tested sediment cartridge that keeps water free of visible particulates without altering taste or odor.