ESPA4-4040 Hydranautics Nitto 2,500 GPD at 100 PSI 4 x 40 inch 99.2% Rejection Membranes

Hydranautics ESPA4-4040 Extra Low Energy Brackish Water RO Membrane (2,500 GPD)

The Hydranautics ESPA4-4040 (manufactured by a Nitto Group Company) is a commercial-grade, ultra-low pressure reverse osmosis (RO) membrane designed for maximum energy efficiency without compromising water quality. As one of the highest productivity elements in the ESPA (Energy Saving Polyamide) family, this 4-inch by 40-inch spiral-wound membrane is specifically engineered for applications where reducing operational costs and energy consumption is the primary objective. It is the ideal solution for municipal drinking water systems, industrial process water, and high-volume commercial RO units.

By utilizing a proprietary high-flux polyamide thin-film composite, the ESPA4-4040 is capable of yielding a significant permeate flow of 2,500 GPD at an exceptionally low test pressure of just 100 PSI. It offers a nominal salt rejection of 99.2%, effectively removing dissolved solids while maintaining continuous, high-throughput water production. The element features a durable 34-mil feed spacer that improves hydrodynamics and reduces the risk of fouling, ensuring stable performance and extended intervals between chemical cleanings. This reliable, ultra-pure water output provides the exact purity necessary for spot-free rinses at commercial car washes, prevents mineral scaling in water vending and refilling machines, and guarantees a streakless finish for window washing and solar panel cleaning. Furthermore, its robust permeate production makes it an ideal core component for precise nutrient dosing in hydroponics and agriculture, as well as maintaining strict flavor profiles in bottling plants and breweries.