A simple, robust way to quickly process up to 48 samples at one time. The Positive Pressure Manifold can accommodate a multitude of column sizes and provides even flow to each position. All 48 positions are individually regulated to provide even pressure to each column. There are four banks of 12 positions each. The user can control flow to each of the four banks. Capacity of 1 to 48 columns adaptable for size 1mL, 3mL, 6mL, 10mL or 15mL. Air Supply: N2 or compressed air regulated to 75 psi and filtered to 10μm. Dual pressure regulators allow users to set different pressures for extraction and column drying. Includes waste reservoir that drains automatically. Single switch raises and lowers the sample racks and creates an airtight seal.