Description
That rotten egg smell coming from your tap isn’t your imagination, and it isn’t going away on its own. It’s hydrogen sulfide gas, and it’s a common problem in well water — along with dissolved iron, which shows up as staining on fixtures and a metallic taste. This whole house water filter system is built specifically to target both, using KDF-85 media at its core, backed by a full 3-stage filtration process.
If you’re looking for a more compact solution for a smaller apartment or tight space, view our 3.5″x10″ Slim Line KDF-55 System for targeted heavy metal filtration instead.
Ensure your home has access to premium quality water with our high-capacity 3-stage filtration system. Specifically designed for larger homes or those dealing with specific well water issues like sulfur and iron, this system provides a robust barrier against common household water contaminants.
Professional 3-Stage Filtration Technology
Stage 1 – Multi-Layered Sediment Filter (5 Micron)
Constructed from 100% pure polypropylene, this cartridge uses a graded density design. It captures larger particles on the outer layers and finer sediment deep within the core, giving you true depth filtration rather than just a surface screen. This prevents premature clogging and protects your home’s appliances and plumbing from grit, rust, and silt before it ever reaches the KDF-85 stage.
Stage 2 – KDF-85 & GAC Advanced Media
This is the heavy-duty stage, and the reason this system exists. It contains a full pound of KDF-85 copper-zinc media combined with granular activated carbon.
- Iron & Sulfur Removal — KDF-85 is specifically engineered to target dissolved iron and hydrogen sulfide, the cause of that “rotten egg” odor
- Bacteriostatic Control — naturally inhibits the growth of bacteria, algae, and microorganisms within the filter
- Scale Prevention — helps reduce scale buildup in pipes and water heaters
KDF-85 works through a redox (oxidation-reduction) reaction that converts dissolved iron and hydrogen sulfide into forms that get trapped in the filter media, rather than passing through to your taps. It’s specifically formulated for iron and sulfur — a standard carbon or KDF-55 filter won’t handle hydrogen sulfide the same way.
Stage 3 – High-Density Coconut Carbon Block (5 Micron)
The final stage uses a premium coconut shell carbon block, providing maximum adsorption of chlorine, organic chemicals, and any lingering tastes or odors. Its 5-micron rating means your water isn’t just treated for iron and sulfur — it comes out with a polished, bottled-water quality from every tap.
Why Choose the 4.5″ High-Flow System?
Unlike smaller slim-line systems, the 4.5″ diameter cartridges allow a much higher volume of water to pass through without a significant drop in pressure. This makes it the right choice for family homes where multiple showers or appliances might run at the same time. It’s particularly effective for households on well water or municipal water with high mineral and sulfur content, where a smaller cartridge would need much more frequent changing.
Specifications
| Feature | Details |
|---|---|
| Filtration Stages | 3 Stage (Sediment, KDF-85/GAC, Carbon Block) |
| Connection Size | 3/4″ FNPT |
| Housing Size | 4.5″ x 10″ (High-Flow / Big Blue Style) |
| Filter Cartridge Dimensions | 4.5″ x 10″ |
| KDF-85 Media | 1 lb per system |
| Primary Function | Iron and hydrogen sulfide (rotten egg smell) reduction |
| Also Removes | Sediment, chlorine, organic chemicals, tastes and odors |
| Housing Type | Triple 10-inch Big Blue with pressure release buttons |
| Flow Rate | High-flow design for whole-house applications |
| Maintenance | Built-in pressure release for quick, effortless cartridge swaps |
Who This System Is For
- Well water homeowners noticing a rotten egg smell, especially strongest when the water first runs
- Households with iron staining on sinks, tubs, or laundry from dissolved iron in the water supply
- Larger family homes needing higher flow across multiple bathrooms and appliances running at once
- Anyone wanting bacteria and scale control built into the filtration itself, not just odor masking
Frequently Asked Questions
Why does my well water smell like rotten eggs?
That smell is hydrogen sulfide gas, commonly found in well water. It can come from natural sulfur-reducing bacteria in the well or decaying organic matter underground. KDF-85 media is specifically formulated to reduce hydrogen sulfide along with dissolved iron.
How is KDF-85 different from KDF-55?
KDF-55 focuses on chlorine reduction, heavy metals, and bacteria control. KDF-85 is formulated specifically for iron and hydrogen sulfide removal — the media that actually addresses rotten egg odor, which KDF-55 does not target.
Will this handle high sulfur levels?
This system works well for low to moderate iron and hydrogen sulfide levels, which covers most residential well water situations. For unusually high sulfur concentrations, a water test can help confirm whether additional pre-treatment may be needed.
How often should I replace the filters?
Replacement frequency depends on your water’s iron and sulfur levels along with household usage, but most homes see 6–12 months of service life before the KDF-85 stage needs replacing.
Stop the rotten egg smell at the source — treat it where your water enters your home.
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