Nelsen Corporation
5600 AIO 12X52 Sulfur System
5600 AIO 12X52 Sulfur System
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A complete whole-house air-injection filter. One price includes everything listed below.
What's in the box
| Size | Mineral tank | Media | Control valve |
|---|---|---|---|
| 12" x 52" | 12" x 52" | sulfur-removal filter media (catalytic carbon blend) | Fleck 5600SXT air-injection valve |
- Control valve: Fleck 5600SXT air-injection valve with built-in air injection.
- Bypass: 3/4" bypass valve (included).
- Mineral tank: black fiberglass-wrapped mineral tank with support bed and distributor.
- Media: sulfur-removal filter media (catalytic carbon blend), sized to the tank.
- Also included: 1" plumbing adapters, install and service manuals.
- Ships pre-built, ready to install, free in the US.
How it works
The valve draws a pocket of air into the top of the tank. Water passes through the air, which oxidizes iron, manganese and hydrogen sulfide into particles, and the media bed filters them out. Every day the valve backwashes the bed, sends the trapped particles to drain and refreshes the air pocket.
Media benefits
- Removes hydrogen sulfide: no rotten-egg smell
- Stops black staining on fixtures and silverware
- Daily automatic backwash keeps the bed clean
- Air injection oxidizes iron, manganese and sulfur with plain air, so no chemicals or chlorine are added
Why this system costs what it does
| This system | Typical lower-priced kits | |
|---|---|---|
| Iron and sulfur treatment | Air injection: oxidizes with plain air, no chemicals | Often chlorine or permanganate feed, or no oxidation step |
| Filter design | Automatic daily backwash keeps the media bed clean | Often a non-backwashing upflow head or a cartridge housing |
| Bypass valve | 3/4" bypass included | Often not included or an extra option |
| Media | Named media, sized to the tank | Media type or amount often not stated |
| Delivery | Ships pre-built, ready to install | Often ships in pieces for you to assemble and load |
| Shipping | Free in the US | Free only above a minimum, or extra |
Not sure which size? Send a water test or tell us your symptoms and we will size it free.
What's in this system
- Fleck 5600SXT air-injection (AIO) control valve
- 3/4" bypass valve
- 12" x 52" black polyglass mineral tank with riser and basket distributor
- Gravel support bed
- 1.75 cu ft sulfur blend: catalytic carbon (75%) and Birm (25%)
- 1" plumbing adapters
How it ships: direct to you, free in the USA, in more than one box: the valve, the mineral tank, and the gravel and media in bags. You (or your plumber) pour the gravel and media into the tank and thread the valve on before installing. It usually takes 20 to 30 minutes, and step-by-step instructions are included.
When sulfur odor demands a higher-capacity solution, the 5600 AIO 12X52 Sulfur System provides the tank volume and media depth needed to handle it. This 12" x 52" air injection unit drives out hydrogen sulfide and its signature rotten-egg smell across the whole house, all without salt or chemical additives, making it ideal for busy households where odor-free water matters at every tap.
Air Injection in Action
The Fleck 5600SXT control valve maintains an air pocket inside the mineral tank. As water passes through this oxidizing zone, dissolved sulfur converts to a filterable form that the media bed captures and holds. On a programmed schedule, the valve backwashes the bed, sending trapped contaminants to drain and refreshing the air cushion automatically, so the system keeps performing without any chemical replenishment between cycles.
- High-capacity 12" x 52" sulfur reduction for demanding households
- Fleck 5600SXT digital control valve with automatic regeneration
- Black Structural mineral tank including full gravel support bed
- Matched media supplied for hydrogen sulfide removal
- 3/4" bypass valve included for service convenience
- Chemical-free; approximately 169 lbs shipping weight
The wider 12-inch tank boosts service flow, making this model a strong match for larger families or wells with stubborn hydrogen sulfide and heavy simultaneous demand. As a point-of-entry system, it ensures every shower, tap, and appliance receives odor-free water from a single installation. Built around the proven AIO platform and supplied complete by Water Softener Plus, it combines dependable 5600SXT automation with generous media capacity for consistent, low-maintenance performance over the long haul.
When planning the install, locate the system at the point of entry ahead of any softener so hydrogen sulfide is removed before it reaches other equipment or the water heater. A nearby drain handles backwash discharge, and the control head plugs into a standard outlet. Because sulfur problems can fluctuate seasonally on some wells, the scheduled backwash keeps odor control steady even as conditions change throughout the year.
Supplied and supported by Water Softener Plus, this -built system reflects the quality and consistency homeowners and installers have come to expect from the brand, giving you confidence in a long, dependable service life treating your home's water.

