AXEON's TE-3012-500 RO membrane requires a minimum of 70psi of incoming water pressure with a maximum TDS of 250ppm. This membrane element offers reliability, high performance and consistent results for pump-less light commercial applications. All membranes are shipped dry for indefinite shelf life, are 100% vacuum integrity tested and can also be ordered as individually wet tested. The membrane is designed to fit 12" x 3" RO Membrane Housings such as the AXEON 208438 RO Membrane Housing.