18" X 65" NWS 1.5" Composite Control AIO

The 18" X 65" NWS 1.5" Composite Control AIO offers a larger air-injection bed paired with Nelsen Water Solutions' corrosion-resistant composite control valve. The patented air-injection process eases the air pocket out gradually and delays regeneration during active water use, which protects the drain line and reduces water waste in everyday operation. The composite valve construction makes it a smart choice for damp utility spaces where corrosion resistance matters over the long haul.

Because media is selected separately, you can size the bed precisely from the included chart. An 18" tank typically takes 2.5 cu. ft. of Birm or Centaur for sulfur (about 9 gpm), 5 cu. ft. of Birm for iron, or 5 cu. ft. of Katalox-Light® rated to roughly 20 gpm service flow. The system includes the NWS 1-1/2" Composite Control with Control Flow Technology, a remote meter, a gravel underbed, and the 18" x 65" mineral tank, so all the hardware is ready for the media that suits your water.

• 18" x 65" mineral tank for added capacity
• NWS 1-1/2" Composite Control with Control Flow Technology
• Sulfur (Birm/Centaur): ~2.5 cu. ft. at about 9 gpm
• Katalox-Light®: ~5 cu. ft. up to roughly 20 gpm service flow
• Remote meter and gravel underbed included; media separate
• Shipping weight: approximately 237.67 lbs

The composite valve stands up to humid mechanical rooms while the 1-1/2" flow path serves higher household demand from multiple fixtures. During each cycle the system draws air to oxidize contaminants, backwashes to flush them to drain, and returns to service automatically based on metered water use. Reference the media selection chart to match Birm, Centaur, or Katalox-Light® to your specific iron, manganese, or sulfur problem, then finish the build with the correct plumbing adapters for a fully chemical-free filtration system.

Stepping up to the 18" tank gives this composite-valve AIO meaningfully more capacity and flow headroom than the 16" model, suiting homes with above-average water use or stronger contaminant levels. The media chart guides you to the right bed volume for sulfur, iron, or Katalox-Light® service, so the same platform adapts to whatever the water test reveals. Combined with demand-based metering, this flexibility lets installers right-size each job for the best balance of performance, water efficiency, and media life.