Pentair Pentek DGD-5005-20 Big Blue Water Filter - High-Capacity

Our review of the Pentair Pentek DGD-5005-20 finds it best suited for homeowners and well-water users who need a reliable, high-flow pre-filter to protect plumbing and appliances. The single biggest reason to buy is its dual-gradient density design, which boosts dirt holding capacity and reduces particulate load without altering taste or odor. Installation is straightforward for anyone familiar with Big Blue housings, and the cartridge delivers consistent sediment removal across its expected service life.

Key Features

• Dual-gradient density: The filter's density increases toward the center to trap a wider range of particle sizes and extend run time compared with standard spun cartridges.
• 100% pure polypropylene: Chemical resistant construction that will not impart taste, odor or color to filtered water, preserving water quality.
• High dirt-holding capacity: Larger diameter and deep effective filter media give up to three times the particulate capacity of similar size sediment cartridges.
• Compatible sizing: Sized for use in all 20 in Big Blue filter housings and other heavy duty housings, making replacements simple and predictable.
• NSF/ANSI 42 tested: Independently tested and certified to the NSF/ANSI Standard 42 for peace of mind on basic aesthetic effects.
• Maintenance guidance: Recommended replacement every 6 months or when water pressure or quality drops to maintain performance.

Who It's For

This cartridge is ideal for households with municipal or well water that struggle with visible sand, silt, or fine particulates and need a heavy-duty pre-filter before more expensive downstream filtration or appliances. It suits owners of 20 in Big Blue housings who want a straightforward swap-in replacement that balances flow and sediment capture.

Those who need chemical removal, microfiltration for bacteria, or filters tailored to very specific contaminants should look elsewhere; this cartridge is designed for sediment and particulate reduction rather than adsorption or microbiological treatment.

Pros & Cons

Pros

• Effective at removing fine sediment and reducing particulate load in well and municipal water systems.
• High dirt holding capacity and larger diameter deliver longer service life between changes.
• Made from pure polypropylene so it does not affect water taste, odor, or color.
• Easy to install and fits standard 20 in Big Blue housings for quick replacement.

Cons

• Not intended for chemical adsorption or microbiological filtration, so additional filters may be required for those needs.
• Color has drawn mixed comments from some users, though this does not affect performance.

Specifications

Brand	Pentair Pentek
Model	DGD-5005-20
Size	20 in x 4.5 in
Micron Rating	5 micron
Material	100% pure polypropylene
Certification	Tested to NSF/ANSI Standard 42
Pack	Pack of 1

Our Verdict

The Pentair Pentek DGD-5005-20 is a practical, good-value sediment cartridge for anyone using 20 in Big Blue housings who needs robust particulate protection without changing water taste or odor. Its dual-gradient design and high dirt capacity make it a reliable pre-filter to protect appliances and downstream filters, and its six-month recommended interval keeps maintenance predictable.

Frequently Asked Questions

How often should this cartridge be replaced?
Replace every 6 months or sooner if you notice a drop in water pressure or a change in water clarity.

Will it fit my Big Blue housing?
Yes, it is sized for all 20 in Big Blue filter housings and many heavy duty housings that accept 20 in x 4.5 in cartridges.

Does this remove taste or chemicals?
No, this sediment cartridge is designed to remove dirt, sand, silt and particulates and will not remove dissolved chemicals or microbiological contaminants.