WSP Whole House Iron & Sulfur Filter - All-In-One, Katalox, IS-KATALOX-3

If your water leaves orange-brown stains on fixtures or the rotten-egg smell clings to your shower, this filter is designed to help reduce those iron and sulfur issues. It treats multiple well-water contaminants together, making your water clearer and fresher throughout your home.

The problem you’re facing

When your toilet tank shows an orange ring, your sinks or tubs look rusty, or your laundry comes out dingy with a faint rusty tint, that’s iron in your water. If your hot water smells like rotten eggs, that’s hydrogen sulfide gas, often called sulfur smell. These problems don’t just look or smell bad—they can leave a film on shower doors and make towels feel stiff or smell off.

Why it’s happening

This happens because your well water carries dissolved iron and sulfur compounds. When water hits oxygen, these substances change form: iron turns into tiny rust particles that stain, and hydrogen sulfide gas escapes, causing the smell. A simple test to confirm is a water sample checked for iron and sulfur levels, which your local lab or plumber can help with.

What it’s costing you to leave it

Iron buildup can shorten your water heater’s life by forming scale inside it. You’ll use more soap and detergent to get dishes and laundry clean because the metal particles interfere with cleaning. Appliances like washing machines and dishwashers work harder and may wear out faster. You’ll spend extra time scrubbing stains off fixtures and dealing with water that smells unpleasant — problems that only get harder to reverse over time.

How this system fixes it

This filter works by combining air injection and a special catalytic material called Katalox Light. When your water enters the tank, it first mixes with air trapped at the top, which changes iron and sulfur into solid particles. Then the Katalox Light media helps speed up this change and filters out these particles, so your water comes out clearer and without the smell. The system automatically cleans itself with a backwash that flushes away the trapped contaminants and refreshes the air in the tank.

What this system can handle

This all-in-one system is designed for well water that contains iron, manganese, and sulfur together. It can handle multiple contaminants at once, which is important because many wells have this mix. The system runs without chemicals and automatically renews its filtering action with scheduled backwashes. Its single-tank design is compact and easier to install than multiple separate filters. It’s built to work through a good volume of water before needing service, making it suitable for most homes with these common well-water issues.

What you actually get

The package includes a pressure vessel with a lifetime warranty on the tank itself. A bypass valve comes with it, so you can keep water running to your home even when the filter is being serviced — a feature many competitors sell separately. You’ll also get 10 feet of discharge hose for the drain line, making installation straightforward. The system’s control valve and electronics have their own manufacturer's warranty terms, which you can review when ordering.

Is this the right size for you

This system suits households facing moderate to high levels of iron and sulfur in well water, typically those who want one filter to handle multiple problems at once. If your water issues are minimal, a smaller single-purpose filter might be more cost-effective. Conversely, very large homes or heavy industrial water use might require a larger or staged system. We help confirm what fits your situation best before you order.

Living with it

Maintenance involves an automatic backwash cycle that runs on a schedule to clean and refresh the filter media. You’ll need to check the system occasionally and replace parts per the control valve’s warranty and maintenance guidelines. The included bypass valve means your plumber can service the system without shutting off water to your home. Overall, the upkeep effort is moderate but much less than dealing with iron and sulfur problems left untreated.

What it won’t do

This system helps reduce iron, manganese, and sulfur odors, but it does not soften water or remove other contaminants like hardness minerals, bacteria, or sediment. If you have hard water, you’ll need a separate softener. For bacteria or sediment, additional filtration steps would be necessary.

Why buy it from us

Water Softener Plus (WSP) offers this filter with genuine, serviceable components and parts available for years to come. We ship from Tampa, Florida, with free U.S. shipping included in the price. Our lifetime warranty on the tank gives long-term peace of mind. You won’t find a pushy sales pitch here—just straightforward sizing help from people who know this equipment daily and a 90-day money-back guarantee.

Included with this system

• Lifetime warranty on the tank. The control valve and electronics carry the manufacturer's own warranty.
• Bypass valve included, so the system can be isolated for service while water keeps running to the house.
• 10 feet of discharge hose for the drain line.

Specifications

What this system handles

• Orange-brown iron staining
• Rotten-egg sulfur smell
• Rust rings in toilets and tubs
• Staining on laundry

The next step

Order your WSP Whole House Iron & Sulfur Filter online today to start reducing stains and odors in your water.