Hydranautics CPA (composite polyamide) membrane elements have become the trusted industry standard for high performance, high purity applications. CPA elements are available in both 4-inch and 8-inch diameters by 40-inch long spiral wound configurations as well as smaller diameter and shorter length elements for all high purity applications. CPA membranes provide some of the highest salt rejection rates available - every element on every order for every customer.

Hydranautics also offers Integrated Membrane Solutions (IMS) combining a range of RO, NF, UF and MF membrane technologies to achieve the most comprehensive, effective, low-cost solutions for the industry.
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Item #

Item Name

Permeate Flow

Normal Salt Rejection

Minimum Salt Rejection

Membrane Active Area

Add To Cart/Request Quote
CPA-4040E N/A 2250 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water N/A 2250 gal/d8.5 m³/d N/A 99.5 % N/A 99.2 % N/A 65 ft²6.04 m² Request Quote
CPA2-4040 N/A 2250 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water N/A 2250 gal/d8.5 m³/d N/A 99.5 % N/A 99.2 % N/A 85 ft²7.9 m² Request Quote
CPA2 N/A 10000 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water N/A 10000 gal/d37.9 m³/d N/A 99.7 % N/A 99.5 % N/A 365 ft²33.9 m² Request Quote
CPA3 N/A 11000 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water N/A 11000 gal/d41.6 m³/d N/A 99.7 % N/A 99.6 % N/A 400 ft²37.1 m² Request Quote
CPA5-LD-4040 N/A 2100 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water N/A 2100 gal/d7.95 m³/d N/A 99.7 % N/A 99.5 % N/A 80 ft²7.4 m² Request Quote
CPA5-LD N/A 11000 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water N/A 11000 gal/d41.6 m³/d N/A 99.7 % N/A 99.6 % N/A 400 ft²37.1 m² Request Quote
CPA5 MAX N/A 12000 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water N/A 12000 gal/d45.5 m³/d N/A 99.7 % N/A 99.6 % N/A 440 ft²40.9 m² Request Quote
CPA6-LD N/A 8000 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water N/A 8000 gal/d30.3 m³/d N/A 99.75 % N/A 99.6 % N/A 400 ft²37.1 m² Request Quote
CPA6 MAX N/A 8800 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water N/A 8800 gal/d33.3 m³/d N/A 99.75 % N/A 99.6 % N/A 440 ft²40.9 m² Request Quote
CPA7-LD N/A 11500 Gallon Per Day (gal/d) Permeate Flow Composite Polyamide (CPA) High Performance Membrane Element for High Purity Water N/A 11500 gal/d43.5 m³/d N/A 99.8 % N/A 99.7 % N/A 400 ft²37.1 m² Request Quote
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