Fleck 5600 SXT Air Injection Iron Filter Review
Product Overview
The Fleck 5600 SXT Air Injection Iron Eater Filter (Black Series) is designed to improve your home’s water quality by effectively removing iron, manganese, and hydrogen sulfide (H2S). With 1.5 cubic feet of upgraded Centaur Catalytic Carbon inside, it’s built to handle challenging water conditions. This system uses an advanced air injection technology to create a pocket of air within the filter, which super-oxidizes contaminants for better filtration results. It’s a popular choice for those dealing with iron staining, sulfur smells, or manganese taste issues in well or municipal water.

Fleck 5600 SXT Air Injection Iron Eater Filter
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Key Takeaways
- Efficiently removes iron up to 12 ppm, sulfur up to 10 ppm, and manganese up to 2 ppm.
- Air injection technique enhances oxidation for better contaminant removal.
- Upgraded Centaur Catalytic Carbon media improves filtration and longevity.
- Requires moderate DIY plumbing skills for installation.
- May need periodic maintenance and regeneration cycles.
Why You Might Need Fleck 5600 SXT Air Injection Filter
If you’re tired of dealing with rusty stains on clothes, fixtures, or sinks, unpleasant sulfur smells from your taps, or a metallic taste in your drinking water, this system could be the solution you need. Many well owners and households with municipal water sources suffer from iron and manganese contamination that affects water clarity, color, and odor. Removing these impurities is essential not only for aesthetic reasons but also to protect your plumbing and appliances. The Fleck 5600 SXT filter caters to such issues by targeting these specific contaminants with precision.
First Impressions: What to Expect
Opening the Fleck 5600 SXT package gives you a sturdy filtration tank paired with a reliable multi-programmable digital control head. The Black Series filter boasts a sleek, professional appearance that’s compact enough to fit in standard utility spaces. The accompanying instructions are clear and aimed at those comfortable with basic plumbing tasks, such as connecting water lines and installing bypass valves. The air injection feature stands out because it doesn’t rely on a separate oxidation tank, which simplifies the setup. Overall, the initial setup impression is: well-built and thoughtfully engineered.
Specs at a Glance
Feature | Details |
---|---|
Filtration Media | 1.5 Cubic Feet Upgraded Centaur Catalytic Carbon |
Iron Removal Capacity | Up to 12 ppm |
Sulfur (H2S) Removal Capacity | Up to 10 ppm |
Manganese Removal Capacity | Up to 2 ppm |
Control Valve | Fleck 5600 SXT Digital Control Head |
Filtration Technology | Air Injection for Super Oxidation |
Installation | DIY Friendly with Basic Plumbing |

Fleck 5600 SXT Technical Specs
Design & Build Quality
The first thing you notice is the tank’s robust construction. The black finish feels durable and resistant to corrosion. The control head offers a digital interface which is straightforward but powerful. You can program regeneration cycles and monitor usage data easily. One user praised the solid build by saying, “The Fleck 5600 SXT feels like a professional-grade system, and after months of use, it still looks and runs like new.” The air injection system is cleverly integrated, eliminating the need for a separate air pocket tank typically required in older iron removal setups. This compact design keeps installation simpler and requires less space.
Installation components, including bypass valves and adapters, feel sturdy and well-machined. The tank’s capacity of 1.5 cubic feet of catalytic carbon media strikes a good balance between size and performance. It handles high levels of iron and sulfur without frequent regeneration. The digital control valve responds well, cycling through backwashes and regeneration automatically to refresh the media’s effectiveness. Overall, the design reflects a system made for reliability and ease of service over time.
Real-World Performance
When installed in homes with moderate to high iron and sulfur content, the Fleck 5600 SXT Air Injection Filter proves its worth. One homeowner noted that after installation, “The rusty stains stopped appearing on laundry and plumbing fixtures within a week. Plus, the rotten egg smell vanished almost immediately.” This quick turnaround is thanks to the air injection design that super-oxidizes iron and sulfur before filtration.
The filter regenerates automatically based on programmed schedules or water usage, reducing maintenance hassle. Its ability to handle up to 12 ppm iron and 10 ppm sulfur means it covers many common water issues effectively. Some users mentioned that the taste and odor improvements have made their tap water comparable to bottled water, enhancing everyday water use.
Maintenance is straightforward: periodic media replacement is required after years of use, but this frequency is manageable given the system’s robust performance. The control valve’s digital interface also logs regeneration cycles, so you know it’s working efficiently. Overall, the system performs quietly and smoothly, with water pressure remaining stable.

Fleck 5600 SXT in Action
What Makes It Stand Out?
Compared to other iron removal systems, the Fleck 5600 SXT’s air injection technology is unique. Many competitors rely on oxidation tanks or chemical additives to tackle iron and sulfur. For instance, the SpringWell WS or Iron Pro 2 systems use standard media but don’t have integrated air injection. This additional oxidation step in the Fleck filter boosts contaminant breakdown before filtration.
Its 1.5 cubic feet of upgraded Centaur Catalytic Carbon also outperforms basic activated carbon by specifically targeting hydrogen sulfide along with iron and manganese. While some filters specialize only in one of these contaminants, this Black Series model tackles all three effectively.
Additionally, the Fleck 5600 SXT’s programmable digital valve offers a higher level of control compared to manual or semi-automatic units. This system’s longevity and enhanced filtration set it apart for households looking for an all-in-one iron eater solution with minimal complexity.
Strengths vs. Trade-Offs
✅ Strengths | ❌ Trade-Offs |
---|---|
Efficient removal of iron (up to 12 ppm), sulfur, manganese | Requires basic plumbing skills for installation |
Air injection system enhances filtration naturally | Larger tank size requires dedicated space |
1.5 cubic feet of upgraded Centaur Catalytic Carbon | Occasional maintenance and media replacement needed |
Digital control valve simplifies programming | Initial setup can take some time for first timers |
Comprehensive contaminant removal in one system | Some users may need after-installation adjustments |

Fleck 5600 SXT Black Series Strengths
Who Is It For?
This system is ideal for homeowners facing moderate to high iron and sulfur contamination, particularly from well water sources. If you notice rusty stains on laundry or plumbing fixtures, a rotten egg odor when running water, or metallic tastes interfering with daily use, this filter is tailored for your needs.
DIY enthusiasts with some plumbing knowledge will appreciate the clear instructions and manageable installation process. Families looking for an all-in-one solution to remove iron, manganese, and hydrogen sulfide without multiple filters will find the Fleck 5600 SXT beneficial. Additionally, those who want digital control for easy programming and reliable automatic regeneration will benefit from the Fleck valve technology.
Expert Advice to Maximize Results
To get the best performance from your Fleck 5600 SXT filter, start with a thorough water test. This helps you confirm iron, manganese, and sulfur levels and fine-tune the system programming accordingly. Adjust the regeneration cycle to match your water usage and contamination — this prevents overuse or underperformance.
Installing a pre-filter to catch sediment can prolong media life and reduce maintenance. Also, regular backwashing cleans the media bed to maintain flow rates and efficiency. Keep an eye on the control valve’s display for alerts or regeneration status, and follow replacement timelines for the catalytic carbon.
If you’re unsure about plumbing connections, consulting a professional during setup ensures everything works smoothly. Proper installation and routine maintenance keep the system running efficiently for years.

Maximizing Fleck 5600 SXT Performance
FAQ
Q: What contaminants does the Fleck 5600 SXT remove?
A: It removes iron up to 12 ppm, hydrogen sulfide (rotten egg smell) up to 10 ppm, and manganese up to 2 ppm. The upgraded catalytic carbon media combined with air injection targets these specific impurities.
Q: Is installation difficult for a DIYer?
A: If you have basic plumbing skills, this system is designed to be installed by homeowners. The clear instructions and pre-plumbed bypass valve help simplify the process.
Q: How often does the system regenerate?
A: Regeneration cycles are programmable based on your water usage or a set schedule, typically every few days. This keeps the filter media fresh and effective.
Q: Does the air injection require a separate tank?
A: No, the air injection technology is integrated into the filter itself, creating an air pocket inside to oxidize contaminants efficiently without extra equipment.
Q: How long does the catalytic carbon media last?
A: With proper upkeep and regular regeneration, the media typically lasts several years before a replacement is needed depending on water conditions.
Q: Will this system affect water pressure?
A: The Fleck 5600 SXT operates with minimal impact on water pressure thanks to its efficient design and backwash cycles that keep media clean.
Q: Can the system handle municipal water?
A: Yes, as long as the iron, manganese, and sulfur levels are within the system’s capacity (12 ppm iron, 10 ppm sulfur, 2 ppm manganese), it can improve municipal or well water effectively.
Verdict
The Fleck 5600 SXT Air Injection Iron Eater Filter is a well-engineered, all-in-one water filtration system that targets iron, manganese, and hydrogen sulfide contaminants effectively. Its advanced air injection oxidation, upgraded catalytic carbon, and digital control make it a smart pick for improving water quality in homes dealing with stubborn iron or sulfur issues.
