Nelsen Corporation
NWS Control Flow AIO Sulfur System
NWS Control Flow AIO 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 |
|---|---|---|---|
| 10"x44" – 1-3 Baths | 10" x 44" | 1 cu ft sulfur-removal filter media (catalytic carbon blend) | Control Flow metered air-injection valve |
| 10"x54" – 3-4 Baths | 10" x 54" | 1-1/4 cu ft sulfur-removal filter media (catalytic carbon blend) | Control Flow metered air-injection valve |
| 12"x52" – 4-5 Baths | 12" x 52" | 1-3/4 cu ft sulfur-removal filter media (catalytic carbon blend) | Control Flow metered air-injection valve |
| 13"x54" – 5-6 Baths | 13" x 54" | 2 cu ft iron-removal filter media | Control Flow metered air-injection valve |
| 14"x65" – 6+ Baths | 14" x 65" | 3-1/2 cu ft sulfur-removal filter media (catalytic carbon blend) | Control Flow metered air-injection valve |
- Control valve: Control Flow metered air-injection valve with built-in air injection.
- Bypass: bypass valve (included).
- Mineral tank: black fiberglass-wrapped mineral tank with support bed and distributor.
- Media: sulfur-removal filter media (catalytic carbon blend), iron-removal filter media, 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
- Removes dissolved iron: clear water with no orange or brown stains
- Protects fixtures, laundry, water heaters and appliances
- Daily automatic backwash sends the trapped iron to drain
- 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 | 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.
The NWS Control Flow AIO 10"x44" Sulfur System is a compact, salt-free solution for the rotten-egg odor caused by hydrogen sulfide in well water. Built by , it combines air injection oxidation with metered Control Flow Technology to deliver efficient, whole-house odor reduction from a small-footprint tank that fits tight spaces.
An air pocket maintained in the polyglass tank oxidizes dissolved sulfur as water passes through, and the specialized media captures the resulting particles. With Control Flow Technology, regeneration is based on measured water usage, so the system backwashes precisely when needed rather than on a rigid timer — saving water while keeping the media fresh and the air draw effective. There are no feed pumps or chemicals to replenish.
- Sulfur and rotten-egg odor reduction without chemicals
- NWS metered 1" control valve with Control Flow Technology
- 10" x 44" black polyglass mineral tank
- 1 cubic foot of sulfur media plus base media
- Bypass valve included; plumbing adapters chosen separately
- Approximate shipping weight: 115 lbs
Where It Fits
The compact 10" x 44" tank is ideal for homes with limited mechanical-room space that still need dependable sulfur control at the point of entry. Because it relies on oxidation rather than feed chemicals, there is nothing to refill and no salt to haul, which keeps ownership simple and inexpensive. Supplied by Water Softener Plus, the system arrives ready to install once you add the matching plumbing adapters, providing fresh, odor-free water to every tap with very little ongoing maintenance required.
Testing your water for hydrogen sulfide and pH before setup helps confirm that air injection is the right approach and that the system is sized correctly for your conditions. Once installed and programmed, the unit requires very little hands-on care: the air pocket renews itself with every backwash and there is nothing to refill. Over the long term, only an eventual media replacement is needed to keep odor reduction at full strength.
As part of the Water Softener Plus catalog of well-water treatment equipment, this unit is chosen and assembled to deliver consistent, real-world results, helping you protect your plumbing investment while enjoying noticeably better water at every fixture in the house.
