Reverse Osmosis MembranesReverse Osmosis & RO Membranes - Reverse osmosis, often abbreviated to RO is a technique employing a membrane which is “semi permeable” that is; under the influence of pressure a larger proportion of water (the solvent) passes through the membrane than do the dissolved salts or organic molecules (the solutes). Whereas Osmosis occurs naturally without energy required, to reverse the process of osmosis you need to apply energy to the more saline solution. A reverse osmosis membrane is a semi-permeable membrane that allows the passage of water molecules but not the majority of dissolved salts, organics, bacteria and pyrogens. However, you need to 'push' the water through the reverse osmosis membrane by applying pressure that is greater than the naturally occurring osmotic pressure in order to desalinate (demineralize or deionize) water in the process, allowing pure water through while holding back a majority of contaminants. Reverse osmosis (RO) membranes have been shown to significantly reduce total dissolved solids, heavy metals, organic pollutants, viruses, bacteria, and other dissolved contaminants. Experience from commercial membrane wastewater treatment plants has demonstrated that key design parameters must be followed to prevent rapid membrane fouling, and thus reduce high system maintenance costs and significant downtime. offers a full range of residential and commercial reverse osmosis membranes manufactured by or compatible with Filmtec, Toray, Koch, Hydranautics, CSM, Vontron and many more. We specialize in RO membranes which are 2.5 inches, 4 inches and 8 inches in diameter, both residential and commercial reverse osmosis membranes. Click below to see the different available models.

Filmtec Membrane

Toray Membrane

Koch Membrane

Hydranautics Membrane

CSM Membrane

Vontron Membrane