CPA6 MAX Hydranautics Nitto 8,800 GPD at 225 PSI 8 x 40 inch 99.75% Rejection Brackish Water Membranes

High-Capacity Brackish Water RO Membrane for Municipal & Industrial Water Treatment

The Hydranautics CPA6 MAX is a high-rejection brackish water reverse osmosis element built on the same proven CPA6 membrane chemistry as the CPA6-LD, but with 10% more active membrane area packed into the same 8-inch footprint. That extra surface area lets system designers hit the same production target with fewer elements and fewer pressure vessels, reducing both capital cost and floor space in new or retrofit installations. It's the preferred choice for feed waters with low turbidity and silt density, such as brackish well water, where fouling risk is already low and maximizing throughput per vessel is the priority.

Built with a composite polyamide membrane in a spiral-wound configuration, the CPA6 MAX provides 440 square feet of active membrane area and delivers a permeate flow rate of 8,800 GPD with a stabilized salt rejection of 99.75% (99.6% minimum) under standard test conditions. A 28-mil feed spacer supports reliable long-term performance while keeping the element's footprint compact enough to fit standard 8-inch pressure vessels.

Every element ships with a brine seal, interconnector, and O-rings already installed, and is sealed in a preservative-treated bag inside its shipping box to protect the membrane prior to installation. Backed by Hydranautics' decades of experience manufacturing composite polyamide membranes for municipal, industrial, and power generation applications, the CPA6 MAX offers a dependable, high-throughput option for facilities working with well-characterized, low-fouling brackish water sources.

Specification Table